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

ASSISTANT: Hello. How can I assist you?

USER: I need to fly Washington IAD for a round trip, could you please help me in booking my flight ticket ?

ASSISTANT: May I know your travel dates?

USER: Sure, my planned trip dates are 06/17 an 06/19.

ASSISTANT:  Could you provide me your source point?

USER: It is a round trip to IAD.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight. And my fare is 500.

ASSISTANT:  We found a connecting flight UA with flight number 1015 and fare is 100.

USER: Ok, please proceed.

ASSISTANT: You can proceed. Your booking is done.

USER: Thank you for your service.

ASSISTANT: Thank you for availing us.