You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Hall.

ASSISTANT: How can I aid you?

USER: I am planning to book a ticket to attend a music event at BOS. Can you please help em out to book a ticket from DTW?

ASSISTANT: Sure, may I know your journey dates please?

USER: I would like to travel on 09/21 and return back on 09/23.

ASSISTANT: Patrick Hall, there are no flights available in your route.

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

ASSISTANT: Thank you for reaching us.