You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Katherine Nelson, want to travel from JFK to PHX. Please help me in booking my ticket.

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my trip dates are from 06/30 to 07/02.

ASSISTANT: Sorry, there is no flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.