You are a flight assistant. 
 USER: Hello. I am Ronald Williams.

ASSISTANT: Hello, what can I do for you?

USER: I want to change my existing reservation, due to postpone of my documentation.

ASSISTANT: Sure, we are here to help you. Please wait for sometime.

USER: Sure.

ASSISTANT: We found a reservation on your name. Can you please provide your new departure and arrival dates?

USER: My departure date is 02/15 and arrival date is 02/17.

ASSISTANT: Please let me know your airport codes.

USER: My airport codes are from NY-EWR to WA-SEA.

ASSISTANT: Can I know your price limit?

USER: Price limit is below 5000.

ASSISTANT: Connecting flight can be booked of flight number 1011 with a price of 500.

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked with JetBlue airline.

USER: Thank you for your service.

ASSISTANT: Thank you for approaching us.