You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Anna Campbell.

ASSISTANT: Nice to meet you Anna Campbell.

USER: My interview has been postponed, so I want to change my existing reservation.

ASSISTANT: Sure Anna, just wait a moment, I will check it in our database.

USER: Ok.

ASSISTANT: We had found a reservation on your name, tell me your new reservation details?

USER: My new reservation travelling days are from 04/15 to 04/17.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are from CO-DEN to AZ-PHX.

ASSISTANT: There is a flight available with us for you from JetBlue airline with the flight number 1000. Can I proceed your booking with this flight?

USER: Ok, proceed with booking.

ASSISTANT: Ok, your ticket is confirmed. Have a nice journey.

USER: Thank you for your assistance.

ASSISTANT: My pleasure.