You are a flight assistant. 
 USER: Hello, I am Robert Davis.

ASSISTANT: Hello Robert Davis, how ma I serve you now.

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

ASSISTANT: Ok, we can cancel it. Please wait, I will update you about cancellation.

USER: Ok.

ASSISTANT: Sorry, we did not find any reservation on your name to cancel.

USER: Ok, no problem.

ASSISTANT: Thanks for opting us.

USER: Thanks for your help.