Hi. Charles Adams here.
Hello, how  may I assist 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, please wait I will check the reservation on your name and revert to you.
Ok.
Sorry, there is no reservation found on your name.
That's ok, thank you for your help.
Thank you for reaching us.