You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Kimberly Hill. 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: Ok, it is my job to assist you. Please wait a moment while I check for reservation records.

USER: Ok.

ASSISTANT: Sorry, there is no reservation been found on your name in our records.

USER: That's Fine. Thank you.