You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Kevin Hill.

ASSISTANT: How can I help you?

USER: Due to some business meeting I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Sure, I will wait for your response.

ASSISTANT: May I know your new airport codes?

USER: My source airport code is JFK and my destination airport code is SEA?

ASSISTANT: Ok,, can you please provide me your travelling dates?

USER: I will depart on 03/27 and again I will be return back on 03/29.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

ASSISTANT: Here, I found a flight for you with single connection.

USER: Yes, you can proceed for booking.

ASSISTANT: Your ticket is booked with flight number 1016 and airline is Delta.

USER: Thank you very much for booking the ticket.

ASSISTANT: Welcome, have a safe flight.