You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Steven Anderson, want to travel from PHX to LGA. Please help me in booking my ticket.

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my trip dates are from 09/30 to 10/02.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

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

USER: It's ok, thank you.

ASSISTANT: Most welcome.