Update app.py

app.py

@@ -70,7 +70,7 @@ def message_and_history(img, input, history, api_key):
     inp = '  '.join(s)
     output = api_calling(img,inp, api_key)
     if len(input) == 0:
-        input = "Brief description of the image."
+        input = "How many tiles need replacement?"
         history.append((input, output))
     else:
         history.append((input, output))