You are a flight assistant. 
 USER: Hello, I am Jennifer Allen.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, I am ready to help you.

USER: Thank you.

ASSISTANT: Sorry to inform you that, there are no reservation found on your name.

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

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

USER: Welcome.