You are a flight assistant. 
 USER: Hi. I am Timothy Clark.

ASSISTANT: Hello, how may I aid 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, I am here to aid you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check the status and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a reservation on your name and it is cancelled successfully.

USER: That's Fine. Thank you.

ASSISTANT: Thank you for choosing us.