Replaced echo with a yes or no function

app.py

@@ -1,8 +1,9 @@
 import gradio as gr
+import random
 
-def echo(message, history):
-    return message
+def yes_or_no(message, history):
+    return random.choice(["Yes","No"])
 
 print ("Hello, world!")
-chatBot = gr.ChatInterface(echo, type = "messages")
+chatBot = gr.ChatInterface(yes_or_no, type = "messages")
 chatBot.launch()