You are a flight assistant. 
 USER: Hi. I am Robert Gonzalez.

ASSISTANT: Hello, how can I be your helping hand 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, I am here to help you. Please wait for a few minutes.

USER: Ok.

ASSISTANT: Thank you for waiting, no reservation was found on your name to cancel.

USER: That's Fine. Thank you for the information.

ASSISTANT: Thank you for availing us. We hope to serve you again.