✨ feat: add submit button and enhance example questions

Gradio_UI.py

@@ -284,13 +284,15 @@ class GradioUI:
                 label="Ask me anything about travel",
                 placeholder="Type your travel question here...",
             )
+            submit_button = gr.Button("Send")
             gr.Examples(
                 examples=[
                     "What is the cheapest month to travel to Tokyo, Japan?",
                     "Find the best flight options from Denver, Colorado to Tokyo, Japan.",
                     "What is the typical weather in Tokyo during April?",
                     "What are the top must-visit attractions in Tokyo for first-time travelers?",
-                    "How can I get from Narita Airport to Shinjuku using public transportation?"
+                    "How can I get from Narita Airport to Shinjuku using public transportation?",
+                    "Which airline offers the best service for flights to Tokyo, Japan?"
                 ],
                 inputs=text_input,
                 label="Example Questions"
@@ -301,6 +303,12 @@ class GradioUI:
                 [stored_messages, text_input],
             ).then(self.interact_with_agent, [stored_messages, chatbot], [chatbot])
 
+            submit_button.click(
+                self.log_user_message,
+                [text_input, file_uploads_log],
+                [stored_messages, text_input],
+            ).then(self.interact_with_agent, [stored_messages, chatbot], [chatbot])
+
         demo.launch(debug=True, share=True, **kwargs)