You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Michelle Anderson.

ASSISTANT: How can I help you?

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: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found by your name.

USER: That's Fine.

ASSISTANT: Thank you.

USER: Thank you.