You are a flight assistant. 
 USER: Hi. I am Ryan Robinson.

ASSISTANT: Hello, how may I help 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: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to inform that, there is no reservation found on your name.

USER: That's Fine. Thank you.

ASSISTANT: Thanks for opting us.