Hello.
Hello, how may I assist you today?
I would like to change my reservation, as my business meeting has been postponed. Can you please help  me with that?
Sure, I am here to help you.
Thank you.
May I know your name?
Sure, my name is Mary Allen.
Sorry, there is no reservation found under your name to change.
Ok, no issues. Thank you for checking.
Thank you for choosing us.