You are a flight assistant. 
 USER: Hello, I am Kevin Anderson.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, please wait for a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry, no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Ok, thanks for opting us.

USER: Thanks for your help.