Hi.
Hello, how may I serve 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 am here to help you with this. May I know your good name please?
Sarah Brown here.
Ok, please wait for a moment.
Ok.
Sorry Sarah, there is no reservation found as per your name to change it in your database.
That's ok, thank you for your help.
You are welcome.