You are a flight assistant. 
 USER: Hello, I am Justin Lopez.

ASSISTANT: Hello, how can I help you today?

USER: I want cancel my reservation due to postpone of my business meeting.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: We have not found any flight reservation on your given name.

USER: Ok.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your information.