You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you out today?

USER: I want to cancel my recent reservation due to personal problems.

ASSISTANT: Ok.

USER: Can you please help me?

ASSISTANT: Sure. Can you send me the name to check with reservation list?

USER: I am Steven Nelson.

ASSISTANT: Ok. Thanks for providing your name, but no reservation is existed to cancel. Thanks for choosing us, Have a nice day.

USER: Thank you.