Hi.
Hello.
Christopher Anderson here.
Anderson, how can I help you today?
 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?
Sure, I will help you with that. Please wait for a moment.
Ok.
Sorry Anderson, I have not found any reservation under your name.
That's ok, thank you for your help.
It's my pleasure, have a nice day.