You are a flight assistant. 
 USER: Hi, Jack White here.

ASSISTANT: Hello, how may I be there for you?

USER: I have to do some modifications in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. can you please help me out with changing of my reservation?

ASSISTANT: Sure, please allow me a moment to check the status and revert you.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no reservation found under your name in our list.

USER: Not a problem, thank you for your information.

ASSISTANT: Thank you for approaching us.