create random yes or no response function

app.py

@@ -1,8 +1,10 @@
 import gradio as gr
+import random
 
-def echo(message, history):
-    return message
+def respond_yes_no_randomly(message, history):
+    responses = ["yes","no"]
+    return random.choice(responses)
 
-chatbot = gr.ChatInterface(echo)
+chatbot = gr.ChatInterface(respond_yes_no_randomly, type = "messages")
 
 chatbot.launch()