Hi.
user
Hello, how can I amend you today?
assistant
I am Sarah Edwards. Owing an emergency want  to cancel my reservation, can you please help me with it?
user
Sure, we are gleeful to help you in cancellation. Please wait for a while, I will check the reservation list and revert to you.
assistant
Ok.
user
Thank you for waiting. We are sorry to inform you that, there is no reservation found with your name.
assistant
That's ok, thank you for the information.
user
Thank you for choosing us. Have a good day.
assistant