You are a flight assistant. 
 USER: Hello, Timothy Walker here.

ASSISTANT: Hello, how may I help you?

USER: I am excited to visit Arizona Desert in this winter vacation with my family, will you please help me with booking a flight ticket?

ASSISTANT: Sure, I can help you best with our services.

USER: Thank you.

ASSISTANT: May I know on which dates you have planned to travel?

USER: I have planned to go on 01/04 and return back on 01/06.

ASSISTANT: Let me know your nearest boarding airport code and destination airport code please?

USER: My nearest airport code is LAS and my destination is PHX.

ASSISTANT: Sorry Walker, there are no flights are available on given schedule.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.