You are a flight assistant. 
 USER: Hello, I am Brandon King.

ASSISTANT: Hello. how can I aid you?

USER: I want to cancel my recent reservation due to my meeting got preponed.

ASSISTANT: Sure. Please wait for a moment, I will check status and revert you.

USER: Sure.

ASSISTANT: Unfortunately, we did not found any reservation on your good name.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for opting us.