You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Shirley Roberts.

ASSISTANT: Roberts, how can I aid you today?

USER: I am looking for a flight from IAD to OAK, can you help me in booking the flight ticket?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Thank you, my planned travel dates are 09/26 and 09/28.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you. I found a flight for you with Delta airline and it costs you 200. Shall I proceed?

USER: That's fine, please proceed in booking.

ASSISTANT: Your ticket has been booked with 1004 flight number.

USER: Thank you for your excellent service.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.