You are a flight assistant. 
 USER: Hello, I am Anthony Lee.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to go to a event in Detroit, so could you aid me in booking a flight ticket to Detroit?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, I would like to go on Nov 29th and return back on Dec 01st.

ASSISTANT: Could you help me with your airport codes?

USER: My source and destination airport codes are DCA and DTW respectively.

ASSISTANT: Do you have any other preferences?

USER: Ensure it is a single connecting flight.

ASSISTANT: We found a flight on southwest airline, flight number 1022 with the fare of 100. Can I proceed?

USER: Ok, please proceed for further.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.