You are a flight assistant. 
 USER: Hello. I am Katherine Taylor.

ASSISTANT: Hello, how can I aid you?

USER: My exams was canceled so I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure. Please wait for a moment.

USER: Ok.

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

USER: Ok, no problem.

ASSISTANT: Thanks for contacting us.

USER: Thanks for your response.