You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicole Adams.

ASSISTANT: How may I help you at this moment?

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 with that.

USER: Thank you.

ASSISTANT: Ok. wait for a minute, so that  I will check the reservation status.

USER: Ok.

ASSISTANT: We are regret to inform you that, there is no reservation found on your name in our records.

USER: That's Fine. Thank you.

ASSISTANT: Thank you for approaching us.