Hi. Rebecca Lee here.
Hello Lee, 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, I will help you. Please be on hold, I will check your reservation status and get back to you.
Ok sure.
Sorry, I have not found any reservation under your name in our database.
That's ok, thank you for your help.
You are welcome and thank you for choosing us.