You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Owing to an emergency, my FIFA tournament got postponed. So I request you to change my existing reservation.

ASSISTANT: Sure, we are glad to help you to change your reservation. Kindly please mention your name to change it.

USER: Sure, Michael Smith here.

ASSISTANT: Thanks for providing your name, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, we found a reservation on your name. Can you please mention your new reservation dates?

USER: Sure, my new reservation departs 11/27 and 11/29.

ASSISTANT: Ok, please forward your journey airport codes.

USER: Sure, I need to depart from Detroit DTW to Chicago ORD.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a flight in 1010 JetBlue airline with a fare of 200 in economy class. Shall I proceed for booking with a halt?

USER: Go ahead.

ASSISTANT: Sure, your ticket has been confirmed.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing our service.