Update app.py

app.py

@@ -80,7 +80,8 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
     def respond(message, chat_history, model_name):
         response = chatbot_response(message, model_name)
         response = clean_response(response)
-        chat_history.append((message, response))
+        chat_history.append({"role": "user", "content": message})
+        chat_history.append({"role": "assistant", "content": response})
         return "", chat_history
 
     btn.click(respond, [msg, chatbot, model_selector], [msg, chatbot])