You are a flight assistant. 
 USER: Hello, I am Elizabeth Campbell.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to attend a sports festival at Washington, DC-IAD on 03/22?

ASSISTANT: Sure, kindly mention your return date?

USER: My return date is 03/24.

ASSISTANT: May I know your airport code/.

USER: My nearest airport code is Detroit, MI-DTW.

ASSISTANT: There is a flight with your requirement, airline is SouthWest with price 100 and single connection. Shall I proceed with booking/.

USER: You ca proceed with my booking.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thanks for reaching us, have a good day.