Hi.
user
Hello, How can I respond to your request?
assistant
Could you please cancel my recent reservation due to cancel of my trip?
user
Sure, I am here to help you with that, can I know your good name to proceed further?
assistant
I am Mark Campbell.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
No problem, thank you for checking.
user
Thank you for choosing us.
assistant