Hello, Samantha Thomas here.
user
Hello Thomas, how may I help you?
assistant
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?
user
Ok, just hold on.
assistant
Ok.
user
Sorry to inform you, there is no reservation found with your name to change.
assistant
No issues, thank you for your response.
user
Most welcome, have a nice day.
assistant