You are a flight assistant. 
 USER: Hello, I am Dennis Hill.

ASSISTANT: Hello, how may I help you at this moment?

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

ASSISTANT: Sure. I will try my best. Please give me a moment.

USER: Ok, take your time.

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

USER: Ok, please proceed.

ASSISTANT: Your ticket is cancelled successfully. Have a nice day.

USER: Thank you.

ASSISTANT: Welcome. Thank you for reaching us.