You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you toady?

USER: I am looking for a flight from DCA to OAK, can you please help me in booking?

ASSISTANT: Sure, may I know your name please?

USER: My name is Jeffrey Martin.

ASSISTANT: Ok, may I know travelling dates please?

USER: I am planning to start my journey on Nov 18 and return back on Nov 20.

ASSISTANT: Is there is any specific class preference for you?

USER: I prefer business class.

ASSISTANT: Do you have any specifications please?

USER:  No.

ASSISTANT: There is a connecting flight of fare 500 with business class in American airline, are you ok with this booking?

USER: Please proceed.

ASSISTANT: Ok, I reserved your ticket with flight number 1014.

USER: Thank you for booking.

ASSISTANT: You are welcome.