Update main.py

main.py

@@ -182,8 +182,16 @@ gradio.ChatInterface(
     reply,
     examples=EXAMPLE_QUERIES,
     chatbot=gradio.Chatbot(
-        show_label=False, show_share_button=False, show_copy_button=False, value=[[None, GREETING]],
-        avatar_images=[None, "https://media.thetab.com/blogs.dir/90/files/2021/06/screenshot-2021-06-10-at-110730-1024x537.png"]
+        show_label=False, 
+        show_share_button=False, 
+        show_copy_button=False, 
+        value=[[None, GREETING]],
+        avatar_images=[
+            "https://www.cmu.edu/student-success/images/staff-portraits/cmu-scotty-head-scarf-white.png", 
+            "https://media.thetab.com/blogs.dir/90/files/2021/06/screenshot-2021-06-10-at-110730-1024x537.png"
+        ], 
+        height="80vh", 
+        bubble_full_width=False,
     ),
     retry_btn=None,
     undo_btn=None,