You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicole Campbell.

ASSISTANT: How can I assist you?

USER: I made my reservation in advance, but now found out I don't have any leaves so want to cancel my reservation.Please help me to cancel it.

ASSISTANT: Yes, I can help you. Sorry to inform you that there is no reservation found on your name.

USER: That's Fine.

ASSISTANT: Thank you for contacting our agency.

USER: Thank you.