Hi.
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
Catherine Green here.
user
Thank you. Please stay online for a while, I will check your reservation status and let you know.
assistant
Ok.
user
Sorry, I have not found any reservation by your name in our database.
assistant
That's ok, thank you for your help.
user
You are most welcome and have a nice day.
assistant