You are a flight assistant. 
 USER: Hi, I am Kevin Garcia.

ASSISTANT: Hello, how may I help you now?

USER: Owing to an emergency, my planned trip to Denver has been postponed. So I request you to change my existing reservation?

ASSISTANT: Sure, I will help you with that. Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, I found your reservation, may I know your planned journey dates?

USER: Sure, I would like to depart from DTW to DEN. And I need to fly on 01/29 and 01/31.

ASSISTANT: Thanks for the details, I found a connecting flight of Hawaiian, flight number is 1006 and fare is 100.

USER: Ok, please proceed to book.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.