Hello, Samantha Thomas here.
Hello Thomas, how may I help you?
I want to alter my reservation, due to postponement of concert to be held at the place where I wanted to visit, can you please take your some time for helping me?
Ok, just hold on.
Ok.
Sorry to inform you, there is no reservation found with your name to change.
No issues, thank you for your response.
Most welcome, have a nice day.