diff --git a/examples/healthData/README.md b/examples/healthData/README.md
new file mode 100644
index 00000000..28ee1ea3
--- /dev/null
+++ b/examples/healthData/README.md
@@ -0,0 +1,30 @@
+# Health Data Agent
+
+This example requires GPT-4.
+
+Demonstrates a ***strongly typed*** chat: a natural language interface for entering health information. You work with a *health data agent* to interactively enter your medications or conditions.
+
+The Health Data Agent shows how strongly typed **agents with history** could interact with a user to collect information needed for one or more data types ("form filling").
+
+## Target models
+
+For best and consistent results, use **gpt-4**.
+
+## Try the Health Data Agent
+
+To run the Sentiment example, follow the instructions in the [examples README](../README.md#step-1-configure-your-development-environment).
+
+## Usage
+
+Example prompts can be found in [`input.txt`](./src/input.txt).
+
+For example, given the following input statement:
+
+**Input**:
+
+```console
+🤧> I am taking klaritin for my allergies
+
+```
+
+**Output**:
diff --git a/examples/healthData/package.json b/examples/healthData/package.json
new file mode 100644
index 00000000..3008582c
--- /dev/null
+++ b/examples/healthData/package.json
@@ -0,0 +1,22 @@
+{
+  "name": "health-data",
+  "version": "0.0.1",
+  "private": true,
+  "description": "",
+  "main": "dist/main.js",
+  "scripts": {
+    "build": "tsc -p src",
+    "postbuild": "copyfiles -u 1 src/**/*Schema.ts src/**/*.txt dist"
+  },
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "dotenv": "^16.3.1",
+    "typechat": "^0.0.10"
+  },
+  "devDependencies": {
+    "@types/node": "^20.3.1",
+    "copyfiles": "^2.4.1",
+    "typescript": "^5.1.3"
+  }
+}
diff --git a/examples/healthData/src/healthDataSchema.ts b/examples/healthData/src/healthDataSchema.ts
new file mode 100644
index 00000000..4971436a
--- /dev/null
+++ b/examples/healthData/src/healthDataSchema.ts
@@ -0,0 +1,68 @@
+// The following is a schema definition for enetring health data.
+
+export interface HealthDataResponse {
+    // ONLY present when ALL required information is known.
+    // Otherwise, use 'message' to keep asking questions.
+    data?: HealthData;
+    // Use this to ask questions and give pertinent responses
+    message?: string;
+    // Use this parts of the user request not translated, off topic, etc.
+    notTranslated?: string;
+}
+
+export interface HealthData {
+    medication?: Medication[];
+    condition?: Condition[];
+    other?: OtherHealthData[];
+}
+
+// Meds, pills etc.
+export interface Medication {
+    // Fix any spelling mistakes, especially phonetic spelling
+    name: string;
+    // E.g. 2 tablets, 1 cup. Required
+    dose: ApproxQuantity;
+    // E.g. twice a day. Required
+    frequency: ApproxQuantity;
+    // E.g. 50 mg. Required
+    strength: ApproxQuantity;
+}
+
+// Disease, Ailment, Injury, Sickness
+export interface Condition {
+    // Fix any spelling mistakes, especially phonetic spelling
+    name: string;
+    // When the condition started.
+    startDate: ApproxDatetime;
+    // Always ask for current status of the condition
+    status: "active" | "recurrence" | "relapse" | "inactive" | "remission" | "resolved" | "unknown";
+    // If the condition was no longer active
+    endDate?: ApproxDatetime;
+}
+
+// Use for health data that match nothing else. E.g. immunization, blood prssure etc
+export interface OtherHealthData {
+    text: string;
+    when?: ApproxDatetime;
+}
+
+export interface ApproxQuantity {
+    // Default: "unknown"
+    displayText: string;
+    // Only specify if precise quantities are available
+    quantity?: Quantity;
+}
+
+export interface ApproxDatetime {
+    // Default: "unknown"
+    displayText: string;
+    // If precise timestamp can be set
+    timestamp?: string;
+}
+
+export interface Quantity {
+    // Exact number
+    value: number;
+    // Units like mg, kg, cm, pounds, liter, ml, tablet, pill, cup, per-day, per-week, etc.
+    units: string;
+}
\ No newline at end of file
diff --git a/examples/healthData/src/input.txt b/examples/healthData/src/input.txt
new file mode 100644
index 00000000..21138470
--- /dev/null
+++ b/examples/healthData/src/input.txt
@@ -0,0 +1,63 @@
+#
+# Conversations with a Health Data Agent
+# For each conversation: 
+# You start with the first line 
+# Then type the next line in response
+#
+
+# ================
+# USE GPT4
+# ================
+# Conversation:
+i want to record my shingles
+August 2016
+It lasted 3 months
+I also broke my foot
+I broke it in high school
+2001
+The foot took a year to be ok
+
+# Conversation: 
+klaritin
+2 tablets 3 times a day
+300 mg
+actually that is 1 tablet
+@clear
+
+# Conversation: 
+klaritin
+1 pill, morning and before bedtime
+Can't remember
+Actually, that is 3 tablets
+500 mg
+@clear
+
+#Conversation
+I am taking binadryl now
+As needed. Groceery store strength
+That is all I have
+I also got allergies. Pollen
+@clear
+
+# Conversation: 
+Robotussin
+1 cup
+Daily, as needed
+Robotussin with Codeine
+Put down strength as I don't know
+@clear
+
+# Conversation: 
+Hey
+Melatonin
+1 3mg tablet every night
+@clear
+
+# Conversation: 
+I got the flu
+Started 2 weeks ago
+Its gone now. Only lasted about a week
+I took some sudafed though
+I took 2 sudafed twice a day. Regular strength
+@clear
+
diff --git a/examples/healthData/src/main.ts b/examples/healthData/src/main.ts
new file mode 100644
index 00000000..3039e2df
--- /dev/null
+++ b/examples/healthData/src/main.ts
@@ -0,0 +1,51 @@
+import fs from "fs";
+import path from "path";
+import dotenv from "dotenv";
+import { createHealthDataTranslator } from "./translator";
+import { createLanguageModel, processRequests } from "typechat";
+import { HealthDataResponse } from "./healthDataSchema";
+
+// TODO: use local .env file.
+dotenv.config({ path: path.join(__dirname, "../../../.env") });
+
+const healthInstructions = `
+Help me enter my health data step by step.
+Ask specific questions to gather required and optional fields
+I have not already providedStop asking if I don't know the answer
+Automatically fix my spelling mistakes
+My health data may be complex: always record and return ALL of it.
+Always return a response:
+- If you don't understand what I say, ask a question.
+- At least respond with an OK message.
+`;
+
+const model = createLanguageModel(process.env);
+const schema = fs.readFileSync(path.join(__dirname, "healthDataSchema.ts"), "utf8");
+const translator = createHealthDataTranslator<HealthDataResponse>(model, schema, "HealthDataResponse",
+                        healthInstructions);
+
+// Process requests interactively or from the input file specified on the command line
+processRequests("🤧> ", process.argv[2], async (request) => {
+    const response = await translator.translate(request);
+    if (!response.success) {
+        console.log("Translation Failed ❌");
+        console.log(`Context: ${response.message}`);
+    }
+    else {
+        const healthData = response.data;
+        console.log("Translation Succeeded! ✅\n");
+        console.log("JSON View");
+        console.log(JSON.stringify(healthData, undefined, 2));
+
+        const message = healthData.message;
+        const notTranslated = healthData.notTranslated;
+
+        if (message) {
+            console.log(`\n📝: ${message}`);
+        }
+            
+        if (notTranslated) {
+            console.log(`\n🤔: I did not understand\n ${notTranslated}`)
+        }
+    }
+});
diff --git a/examples/healthData/src/translator.ts b/examples/healthData/src/translator.ts
new file mode 100644
index 00000000..c5b1987c
--- /dev/null
+++ b/examples/healthData/src/translator.ts
@@ -0,0 +1,76 @@
+import {Result, TypeChatLanguageModel, createJsonTranslator, TypeChatJsonTranslator} from "typechat";
+
+type ChatMessage = {
+    source: "system" | "user" | "assistant";
+    body: object;
+};
+
+export interface TranslatorWithHistory<T extends object> {
+    _chatHistory: ChatMessage[];
+    _maxPromptLength: number;
+    _additionalAgentInstructions: string;
+    _translator: TypeChatJsonTranslator<T>;
+    translate(request: string): Promise<Result<T>>;
+}
+
+export function createHealthDataTranslator<T extends object>(model: TypeChatLanguageModel, schema: string, typename: string, additionalAgentInstructions: string): TranslatorWithHistory<T> {
+    const _chatHistory: ChatMessage[] = [];
+    const _maxPromptLength = 2048;
+    const _additionalAgentInstructions = additionalAgentInstructions;
+    
+    const _translator = createJsonTranslator<T>(model, schema, typename);
+    _translator.createRequestPrompt = createRequestPrompt;
+    
+    const customtranslator: TranslatorWithHistory<T> = {
+        _chatHistory,
+        _maxPromptLength,
+        _additionalAgentInstructions,
+        _translator,
+        translate,
+    };
+
+    return customtranslator;
+
+    async function translate(request: string): Promise<Result<T>> {
+        const response = await _translator.translate(request);
+        if (response.success) {
+            _chatHistory.push({ source: "assistant", body: response.data });
+        }
+        return response;
+
+    }
+
+    function createRequestPrompt(intent: string): string {
+        // TODO: drop history entries if we exceed the max_prompt_length
+        const historyStr = JSON.stringify(_chatHistory, undefined, 2);
+        
+        const now = new Date();
+
+        const prompt = `
+user: You are a service that translates user requests into JSON objects of type "${typename}" according to the following TypeScript definitions:
+'''
+${schema}
+'''
+
+user:
+Use precise date and times RELATIVE TO CURRENT DATE: ${now.toLocaleDateString()} CURRENT TIME: ${now.toTimeString().split(' ')[0]}
+Also turn ranges like next week and next month into precise dates
+
+user:
+${_additionalAgentInstructions}
+
+system:
+IMPORTANT CONTEXT for the user request:
+${historyStr}
+
+user:
+The following is a user request:
+'''
+${intent}
+'''
+The following is the user request translated into a JSON object with 2 spaces of indentation and no properties with the value undefined:
+"""
+`;
+        return prompt;
+    }
+}
diff --git a/examples/healthData/src/tsconfig.json b/examples/healthData/src/tsconfig.json
new file mode 100644
index 00000000..0f8bbec6
--- /dev/null
+++ b/examples/healthData/src/tsconfig.json
@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "es2021",
+    "lib": ["es2021"],
+    "module": "node16",
+    "types": ["node"],
+    "outDir": "../dist",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "exactOptionalPropertyTypes": true,
+    "inlineSourceMap": true
+  }
+}
diff --git a/package-lock.json b/package-lock.json
index f0c9488b..eb01a17f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -63,6 +63,20 @@
         "typescript": "^5.1.3"
       }
     },
+    "examples/healthData": {
+      "name": "health-data",
+      "version": "0.0.1",
+      "license": "MIT",
+      "dependencies": {
+        "dotenv": "^16.3.1",
+        "typechat": "^0.0.10"
+      },
+      "devDependencies": {
+        "@types/node": "^20.3.1",
+        "copyfiles": "^2.4.1",
+        "typescript": "^5.1.3"
+      }
+    },
     "examples/math": {
       "version": "0.0.1",
       "license": "MIT",
@@ -1135,6 +1149,10 @@
       "resolved": "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.1.tgz",
       "integrity": "sha512-8Rf9Y83NBReMnx0gFzA8JImQACstCYWUplepDa9xprwwtmgEZUF0h/i5xSA625zB/I37EtrswSST6OXxwaaIJQ=="
     },
+    "node_modules/health-data": {
+      "resolved": "examples/healthData",
+      "link": true
+    },
     "node_modules/http-cache-semantics": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/http-cache-semantics/-/http-cache-semantics-4.1.1.tgz",