You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you?

USER: My name is Dennis Nelson, I want to cancel my ticket has my plan to visit my home is cancelled. Can you cancel my reservation?

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: I regret no reservation found by name Dennis Nelson.

USER: Thank you for the information.

ASSISTANT: Thanks.