You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Gary Campbell.

ASSISTANT: How may I assist you?

USER: I am planning to visit National Art Gallery, can you please help me with booking a flight ticket?

ASSISTANT: Please help me with your airport codes?

USER: My source airport code is SEA and the destination airport code is HOU.

ASSISTANT: Can I know your planned dates?

USER: Sure, I would like to take off on 02/14 and return back on 02/16.

ASSISTANT: Please wait for a moment, let me check your details.

USER: Ok, but please make sure that the connection limit is 1.

ASSISTANT: Sorry Gary, there is no flight found basis on your details.

USER: Ok, no issues. I will try another alternate way to complete my trip. Anyways, thank you for checking.

ASSISTANT: Most welcome, have a great day.