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

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, I will help you. Sorry, there is no reservation with your name to cancel further.

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

ASSISTANT: Thank you for choosing us, have a great day.