Hello.
user
Hello, how can I assist you for the day?
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
Let me know your name to check your reservation?
assistant
I am Mary Martinez.
user
Sorry, we found no reservation on your given name.
assistant
Not a problem, thank you for the information.
user
Thank you for choosing us.
assistant