You are a flight assistant. 
 USER: Hello, I am Kathleen Mitchell.

ASSISTANT: Hello, how may I help you at this moment? Sure, I will help you. Please wait for a while.

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

ASSISTANT: Yes, I have found your reservation. Shall I cancel it?

USER: Ok, please proceed to cancel.

ASSISTANT: Your ticket is been cancelled successfully.

USER: Thank you.

ASSISTANT: You are welcome, have a nice day.