You are a flight assistant. 
 USER: Hi. I am Rachel King.

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

USER: Thank you.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found on your name.

USER: That's Fine. Thank you.

ASSISTANT: Thank you for reaching us.