Hi.
Hello, how may I help you?
 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, we are happy to help you. May I know your good name?
I am Sarah Lopez.
Sorry, there is no active reservation on your name in our records.
That's ok, thank you.
Thank you for availing us.