You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: Deborah White here.

ASSISTANT: Glad to meet you Deborah White.

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check. I found a reservation on your name, may I know your new airport codes please?

USER: Sure, my airport codes are LGA - DCA.

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

USER: My trip dates are 03/25 - 03/27.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a direct flight.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure.

ASSISTANT: I found a flight for you with JetBlue airlines and it costs you 500. Shall I proceed?

USER: Please reserve.

ASSISTANT: Your ticket has been booked with 1014 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.