Hello.
user
Hello, how can I aid you  today?
assistant
Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?
user
Please let me know your name?
assistant
I am Anthony Robinson.
user
Please wait for a while.
assistant
Sure.
user
Sorry, no reservation found on your name to change.
assistant
Ok, no issues. Thanks for the information.
user
Thank you for choosing us.
assistant