You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want spend my holiday at Las Vegas. Please book my ticket from PHX to LAS.

ASSISTANT: Sure, I am here to help you, please share your travelling dates?

USER: My trip dates are 07/02 and 07/04.

ASSISTANT: Ok, wait for a moment please.

USER: Sure.

ASSISTANT: May I know your name please?

USER: Katherine Garcia here.

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

USER: It's ok, thank you for checking.

ASSISTANT: It's my pleasure, have a nice day.