You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to Easy Booking agency, how may I serve you at this moment?

USER: My name is Raymond Carter. I want to attend my friend's marriage at New York, could you please help me with booking a flight ticket?

ASSISTANT: Sure, please send the codes of airport where you like to depart and return.

USER: My source airport code is SFO and destination airport code is JFK.

ASSISTANT: When you are willing to travel?

USER: My depart date is 12/17 and return date is 12/19.

ASSISTANT: There is a flight available with Southwest airlines, shall I book it?

USER: Yes, you can proceed the booking.

ASSISTANT: Your ticket is confirmed, flight number is 1021.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing our agency, we are happy to help you any time.