You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Raymond Green. 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. Please wait, I will check your reservation status and let you know.

USER: Ok.

ASSISTANT: Sorry, I did not find any reservation under your name in our database.

USER: That's Fine. Thank you.

ASSISTANT: You are welcome and have a nice day.