Hello, I am Steven Davis.
Hello, how can I aid you today?
I would like to change an existing reservation due to my plan to meet  my former colleague got post pone. Can you help me with this?
Sure, I am here to help you.
Thank you.
Please wait for a while.
Sure.
Sorry, no reservation found on name of Steven Davis.
Ok, not an issue. Thank you for your information.
Thank you for approaching us, have a nice day.