You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you?

USER: I am Samuel Moore. As my exams are postponed, So I need to cancel my recent reservation.

ASSISTANT: Sure, give me a moment.

USER: Ok.

ASSISTANT: Thank you for your waiting. Sorry Moore, there is no reservation with your name. Thank you for reaching us.

USER: Thank you.