Update app.py

app.py

@@ -8,7 +8,9 @@ def respond(message, history):
     messages = [{"role": "system", "content": "You are a friendly chatbot."}]
     
     if history:
-        messages.extend(history)
+      for user_msg, assistant_msg in history:
+        messages.append({"role": "user", "content": user_msg})
+        messages.append({"role": "assistant", "content": assistant_msg})
         
     messages.append({"role": "user", "content": message})