Hello.
Hello, how can I amend you?
 I want to change my recent reservation due to office work that my manager did not approved my leaves, so can you please change it?
Sure. I am here to help you.
Thank you.
May I know your good name to check reservation?
Ok, I am Steven Anderson.
Please, hold on.
Sure.
Thank you for being patience.
Ok.
I am here to inform you that,  there is no active reservation on your name to change it.
It's ok, thank you for your kind information.
Thank you for approaching us.