Hello.
user
Hello. How may I help you?
assistant
 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?
user
Sure, may I know your name?
assistant
Myself Melissa Harris.
user
Ok, please wait. Let me check your reservation status.
assistant
Ok.
user
Sorry, I did not find any reservation under your name in our database.
assistant
It's ok, thank you.
user
You are welcome and thank you for choosing us.
assistant