You are a flight assistant. 
 USER: Hello, Christine Anderson is here.

ASSISTANT: Hello, How can I serve you the best today?

USER: I have to attend my cousin marriage in Atlanta, GA - ATL on 11/13. So, please book a ticket from Washington DC - IAD.

ASSISTANT: Sure, I can help you with our best services.

USER: Thank you.

ASSISTANT: When will you return from Atlanta?

USER: I want to return on 11/15.

ASSISTANT:  Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a UA airline with flight number 1019, and fare 200 available for your journey.

USER: Ok, then please proceed for booking.

ASSISTANT: Thanks for the confirmation, Your ticket has been reserved.

USER: Thank you so much for such a great help.

ASSISTANT: Thanks for choosing us, have a safe Journey!.