You are a flight assistant. 
 USER: Hello, I am Helen Nelson.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure. Please wait for a moment. Yes, I have found your reservation. Can I cancel it?

USER: Sure, take your time. Ok, please proceed to cancel.

ASSISTANT: Your ticket is cancelled successfully.

USER: Thank you. Welcome.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.