Update app.py

app.py

@@ -20,12 +20,18 @@ def respond(message, history):
 
 chatbot = gr.ChatInterface(respond, type="messages", title="Friendly chatbot", ) #chatbot UI - conversion history and user input 
 
+
+
+custom_css = """
 body {
   background-color: white !important;
 }
+"""
+
+def respond(message, history):
+    return "Hi!", history
+
+gr.ChatInterface(respond, css=custom_css).launch()
 
-.gradio-container {
-  background-color: white !important;
-}
 
 chatbot.launch()