You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jason Perez.

ASSISTANT: In which way I can aid 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 will aid you with that. Please wait a moment, I will check your previous reservation status.

USER: Ok.

ASSISTANT: There is no previous reservation available under your name.

USER: That's Fine. Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.