Hello, I am Mark Smith.
user
Hello, how can I aid you?
assistant
I want to change my existing reservation due to my business meeting got postponed. Can you help me in this?
user
Sure, wait a moment.
assistant
Ok.
user
Sorry, no reservation found on your name.
assistant
It's alright, not a problem. Thank you for your information.
user
Thank you for reaching us.
assistant