You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Kevin Roberts. I want to cancel my recent reservation due to cancel of my event. Could you please me?

ASSISTANT: Sure, I will help you. Sorry to say, there is no reservation on your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.