Hi.
Hello, how can I assist 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 glad to help you. Can I have your good name?
Dennis Hernandez here.
Sorry, there is no active reservation on your name in our records.
That's ok, thank you for your help.
Thank you for choosing us.