You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: I am Kevin Clark.

ASSISTANT: OK.

USER: I want to cancel my recent reservation due to my exams dates are postponed. Can you please help me with this?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: I regret that there is no reservation found on your name.

USER: Not a problem.

ASSISTANT: Thanks for reaching us.