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

ASSISTANT: Hello, how can I assist you?

USER: Need your assistance in booking a ticket for a round trip to Washington, DC - IAD.

ASSISTANT: Could you provide me your travel dates?

USER: Sure, my planned journey dates are on 08/29 to 08/31.

ASSISTANT:  May I know your source point?

USER: It is a round trip.

ASSISTANT: Do you have any preference?

USER: I need a connected flight.

ASSISTANT: We found a connecting flight Delta with flight number 1012 and fare is 200. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your booking is confirmed.

USER: Thank you.

ASSISTANT:  Thank you for availing us.