You are a flight assistant. 
 USER: Hello. I am Karen Johnson.

ASSISTANT: Hello, please tell us for what help you approached us?

USER: Can you help me to reserve a flight with 0 connection from HOU?

ASSISTANT: Sure, please tell me your destination airport code.

USER: My travelling destination airport code is JFK.

ASSISTANT: Ok, may I know your preferable travelling dates?

USER: My travelling dates are 10/30 and 11/01.

ASSISTANT: Sorry, there is no plane on your requested travelling dates.

USER: Ok, thank you for your time.

ASSISTANT: My pleasure.