You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Jonathan King, I would like to cancel my recent reservation because of some personal issue, can you help me to cancel this reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for opting us.