You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to visit Philadelphia.Can you please help me for booking the flight ticket from PA-PHL to DC-DCA?

ASSISTANT: May I know travel dates please?

USER: The travel dates are from 07/31 to 08/02.

ASSISTANT: There is no flight available.

USER: That's no problem.

ASSISTANT: May I know your name please?

USER: Sure,my name is Brandon Phillips.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your information.