Hello,.
user
Hello, how can I help you?
assistant
 Due to a sudden meeting at office with my client on my boarding day, I want to cancel my recent reservation. Can you help me?
user
Sure, please let me know your name.
assistant
I am Larry Hill.
user
There is no reservation active with your name.
assistant
Ok, not a problem at all. Thanks for your information.
user
Have a good day.
assistant