You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Gary Adams here. I have to do some modification 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 wait while I fetch your active reservation.

USER: Ok.

ASSISTANT: We didn't find any reservation on your name to change.

USER: Ok, no issues. Anyways, thank you for the information.

ASSISTANT: Thank you.