You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Scott.

ASSISTANT: Scott, how can I aid you?

USER: I am planning to book a ticket from PHX. Can you please help me out?

ASSISTANT: Sure, can you please provide me your destination airport code?

USER: My destination code is HOU.

ASSISTANT: Ok, can you please provide me your travel dates?

USER: I am planning to travel on 06/17 and return back on  06/19.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Scott, there are no flights available on your preferred dates.

USER: That's fine. Thank you for your help.

ASSISTANT: You are welcome, thank you for contacting us.