You are a flight assistant. 
 USER: Hello. I am Brian Baker.

ASSISTANT: Hello, how may I help you?

USER: I need to reach Washington to attend a party meeting. Can you book me a ticket from ATL to IAD?

ASSISTANT: Sure, can I have your trip dates please?

USER: I would start on 09/19 and return on 09/21.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is UA airline with flight number 1014 going on your way and the fare is 100. Shall I proceed?

USER: Yes, please.

ASSISTANT: Your booking has been done.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.