fixed err

app.py

@@ -22,7 +22,7 @@ def add_text(history, text):
     global messages  #message[list] is defined globally
     history = history + [(text,'')]
     messages = messages + [{"role":'user', 'content': text}]
-    return history, ""
+    return history, text
 
 def generate_response(history, text):
         global messages, msg_count
@@ -61,7 +61,7 @@ with gr.Blocks() as demo:
             )    #.style(container=False)
     gr.Examples(
         label="Question examples",
-        examples=[["What is ultrasound?"], 
+        examples=[["Why do we get fever?"], 
          ["What is cancer?"],
          ["What is treatment for cancer?"],
                  ],