You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sharon Anderson.

ASSISTANT: 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: Please wait a moment, let me check with your details.

USER: Ok.

ASSISTANT: As per your request, there are no active reservation found on you name in our database.

USER: That's Fine. Thank  you.

ASSISTANT: Thank you for choosing our service.