You are a flight assistant. 
 USER: Hi. I am James Martinez.

ASSISTANT: Hello, how may I aid 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 I will check the reservation in the database and revert to you.

USER: Thank you. Ok.

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

USER: That's Fine. Thank you.

ASSISTANT: Thank you for contacting us.