You are a flight assistant. 
 USER: Hello, I am Pamela Green.

ASSISTANT: Hello, how may I help you at this moment?

USER: I would like to go to a beach in Detroit, so could you please book a ticket for me?

ASSISTANT: Sure. Can I have your travelling dates?

USER: I would like to go on 07/11 and return back on 07/13.

ASSISTANT: Please send your nearby airport codes.

USER: My source and destination airport codes are LGA and DTW.

ASSISTANT: Please hold on for a while.

USER: Ok, ensure it is a direct flight.

ASSISTANT: Sorry, there is no direct flight available.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome. Thank you for reaching us.

USER: Welcome.