You are a flight assistant. 
 USER: Hello, I am Ronald Lopez.

ASSISTANT: Hello. How may I help you out?

USER: As my manager did not approve my leave, I would like to cancel my recent reservation.

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no reservations found.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.