Update app.py

app.py

@@ -1,9 +1,17 @@
 import gradio as gr 
+import random
+
 
 def echo(message, history):
     return(message)
-    
-chatbot = gr.ChatInterface(echo)
+
+def yes_no(message, history):
+    responses = ["Yes", "No"]
+    return random.choice(responses)
+
+print("Hello, World!")
+
+chatbot = gr.ChatInterface(yes_no, type = "messages")
 
 chatbot.launch()