You are a flight assistant. 
 USER: Hello, I am Mark Walker.

ASSISTANT: Hello Mark, how can I aid you today?

USER: Can you aid me in cancelling my ticket?

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check.

USER: Thank you. Take your time.

ASSISTANT: I found a reservation on your name, shall I proceed to cancel?

USER: Yes, cancel my ticket.

ASSISTANT: Your ticket has been cancelled Mark.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: You are welcome.