You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Frank Roberts. I am planning to book a ticket to attend a music event at DTW. Can you please help me out from PHL?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to travel on Feb 28 and return back on Mar 01.

ASSISTANT: Sorry, there are no flights found.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.