You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need your help to book a ticket from PHL to JFK.

ASSISTANT: Can I know your name please?

USER: My name is Debra White.

ASSISTANT: OK White, can you provide the travel dates please?

USER: Departure date is 08/15 and return date 08/17.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Debra, there are no flights available as per your request.

USER: That's really sad.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Anyways, thank you for the information.