You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margret Campbell.

ASSISTANT: How may I help you?

USER: I am planning to book a ticket to attend a music event at PHX. Can you please help me out?

ASSISTANT: Sure, can you share your travel dates please?

USER: I would like to travel on 03/17 and return back on 03/19.

ASSISTANT: And your source details please?

USER: My source code is PHL.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you.