You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Wright.

ASSISTANT: Wright, how can I help you today?

USER: I have to attend my sister's wedding at Detroit, could you please help me with booking a flight ticket?

ASSISTANT: Sure, can you let us know your journey dates?

USER: I would like to take off on 02/21 and return on 02/23.

ASSISTANT: May I know your airport codes?

USER: My nearest source airport code is DCA and destination airport code is DTW.

ASSISTANT: Wright, can you please wait for a while?

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight available from Delta airlines with 1 connection. Shall I proceed for book your ticket?

USER: Please proceed with the booking if the ticket fare is less than 500.

ASSISTANT: Sure, your ticket is confirmed and it costs you 100 only. And your flight number is 1007.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.