Hi.
Hello.
Patricia Anderson here.
How can I aid you at this moment?
 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 glad to help you with that. Please wait for a minute.
Ok.
Sorry to say that, there is no reservation found based on your name in our database.
That's ok, thank you for your help.
Thank you for consulting  us.