You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Richard Davis. I want to travel to GA-ATL to attend a national conference.

ASSISTANT: Ok.

USER:  Can you book a ticket on 03/26?

ASSISTANT: Sure, we are happy to help you. When do you want to return?

USER: I will return on 03/28.

ASSISTANT: Please, let me know your origin point.

USER: I will depart from DC-IAD.

ASSISTANT: Do you have any limit on price?

USER: My budget is 500.

ASSISTANT: Thanks for sharing the details, there is a connecting flight available with fare 200 in UA airline. Shall I proceed?

USER: Ok, you can confirm.

ASSISTANT: Your ticket was confirmed with flight number 1000.

USER: Thank you for booking.

ASSISTANT: Thank you.