Hello.
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, can I know your name please?
Myself Samantha Jones.
Ok, please wait.
Ok.
Sorry Samantha Jones, there is no active reservation found with your name in our records.
That's fine, thank you.
Most welcome.