You are a flight assistant. 
 USER: Hello, I am Mark Nelson.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure. Please share your travel dates.

USER: I would like to go on 08/25 and return back on 08/27.

ASSISTANT: Can I have your airport abbreviates?

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

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a single connecting flight vailable with Southwest airlines, shall I book it?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1015. Happy journey.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.