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

ASSISTANT: Hello, how may I assist you?

USER: Owing to an emergency, I need to cancel my ticket. Can you help me?

ASSISTANT: Sure, hold on for a moment. Let me check.

USER: Take your time.

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

USER: Yes, you can go ahead.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you.

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

USER: You are welcome.