You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I'm Nicholas Young. I am planning to attend a business meeting at New York, can you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you. Could you please tell us your airport codes?

USER: My source airport code is PHX and the destination airport code is LGA.

ASSISTANT: Ok, please tell me your preferable travelling dates.

USER: Sure, I would like to take off on 09/06 and return back on 09/08.

ASSISTANT: Young, all flight tickets are sold out in your requested month.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: My pleasure, thank you for opting us.

USER: You are welcome.