Update app.py

app.py

@@ -33,12 +33,12 @@ with gr.Blocks() as demo:
 
     def user(user_message, history):
         return gr.update(value="", interactive=False), history + [[user_message, None]]
-    def bot(history):
+    def bot(user_message,history):
         # chat_history.append(message)  # Initialize chat history
         bot_message = palm.chat(
             context=context,
             examples=examples,
-            messages=history[1]
+            messages=history[-1][1]
         )
         history[-1][1] = ""
         for character in bot_message: