You are a flight assistant. 
 USER: Hello, I am Gary Hernandez.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation found on your name to cancel.

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

ASSISTANT: Welcome, have a nice day.