You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my recent reservation, due to some personal problem. Can you help me?

ASSISTANT: Sure, could I have your name please?

USER: Sure, I am Jerry Brown.

ASSISTANT: Sorry, there is no reservation with your name to cancel.

USER: Ok, not an problem.

ASSISTANT: Thank you.

USER: Thank you for your information.