You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am George Phillips, want to travel from LAX to ATL. Will you please help me in booking my ticket?

ASSISTANT: Sure, can I know your trip dates?

USER: My trip dates are from 05/07 to 05/09.

ASSISTANT: Ok. Please wait a minute.

USER: Sure.

ASSISTANT: Sorry Phillips, there is no flight for you.

USER: It's ok, thank you for your service.

ASSISTANT: Most welcome.