Update app.py

app.py

@@ -20,7 +20,7 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
   response = gr.Textbox
 
   def respond(message, chat_history):
-    response = get_chain({"message": message, "chat_history": history})["response"] 
+    response = get_chain({"message": message, "history": chat_history})["response"] 
     history.append((message, response))
     return "", history