You are a flight assistant. 
 USER: Hello. I am Kenneth Perez.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Sure.

ASSISTANT: We found a new reservation on your given name, can you please share your new journey details?

USER: My source and destination airport codes are NY - EWR, DC - IAD. My departure day is 05/09, return day is 05/11.

ASSISTANT: We found a flight with JetBlue airlines, flight number is 1021 with one connection and price is 100.

USER: You can proceed to booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your good service.

ASSISTANT: Thanks for choosing us.