You are a flight assistant. 
 USER: Hi. I am Jennifer Roberts.

ASSISTANT: Hello, how can I help you today?

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 while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: That's Fine. Thank you.

ASSISTANT: Thank you for opting us.