You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Donald Smith. I want to travel to DCA on 08/07 and my return date is 08/09.

ASSISTANT: Ok.

USER: Please reserve flight ticket for me. My origin is DFW.

ASSISTANT: Sure, wait a while.

USER: OK.

ASSISTANT: We are glad to inform you that, you have a flight with airline UA with flight number 1001 with 1 connection and price 100. Can I reserve?

USER: Please book.

ASSISTANT: Your reservation is done. Thank you for choosing us, have a great day.

USER: Thank you so much.