You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. which help you are expecting from my side?

USER: I would like to travel from LAX to PHX, could you help me out?

ASSISTANT: Sure, I will help you in that, please share your travelling dates?

USER: My preferable dates are from 12/09 to 12/11.

ASSISTANT: May I know your name please?

USER: My name is Brian Wilson.

ASSISTANT: Brian, sorry for the inconvenience, no flights as per your details.

USER: That's ok. Thank you for your time.

ASSISTANT: You are welcome.