Hello.
user
Hello, how  may I aid you today?
assistant
I am David Williams. Owing to an emergency meeting, I want to cancel my recent reservation. Can you please help me with this?
user
Sure, we are here to help you.
assistant
Thank you.
user
Please wait a moment.
assistant
Sure.
user
Thank you for your time, unfortunately no reservation found with your name.
assistant
No problem, thanks for your information.
user
Thank you for opting us.
assistant