Hi.
user
Hello, how can I aid you today?
assistant
I want to cancel my recent reservation due to sudden cancellation  of my trip. Can you help me?
user
Sure, we are glad to assist you in that.
assistant
Thank you.
user
Before cancelling your previous flight reservation. May I know your name?
assistant
Larry Brown here.
user
Sorry Larry Brown, based on your name we haven't found any flight reservation to cancel in airline database.
assistant
That's Fine, Thank you for the information.
user
Thanks for reaching us.
assistant