You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Christopher Smith, want to travel from PHX to LAS. Please help me in booking my ticket.

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my trip dates are from 10/22 to 10/24. Please check the flight with 1 connection.

ASSISTANT: Sorry, on these dates there is no flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.