You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I'm Paul Lee.

ASSISTANT: Yes, Lee.

USER: I am planning to attend music concert at New York, can you please help me with booking a flight ticket?

ASSISTANT: Definitely, can you give me your source and destination airport codes please?

USER: My origin airport code is ORD and the destination airport code is JFK.

ASSISTANT: May I know your preferred dates for travelling, Lee?

USER: Sure, I would like to take off on 04/21 and return back on 04/23.

ASSISTANT: There is a flight available for you on those dates with ticket price of 100 and having single connection. Shall I proceed booking?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket has been booked with flight-1026 from UA airline.

USER: Thank you for your help.

ASSISTANT: My pleasure, thank you for choosing us.