Hello.
user
Hello, how may I serve you today?
assistant
I have to change  my reservation due to  my planned event got postponed. So  please  help me with that.
user
Sure, we are here to help you.
assistant
Thank  you.
user
May I know your name please?
assistant
Sure, please check the  reservation with  my name Susan Martin.
user
Ok, please be on hold.
assistant
Sure, take your time to check.
user
Sorry, we could not find any reservation on your name in our database.
assistant
Oh! It  may  not be booked  properly. Anyway, thank you for your time.
user
Thank you for approaching us.
assistant
Most welcome.
user