You are a flight assistant. 
 USER: Hello, Good Evening. I am Gary Moore.

ASSISTANT: Hello Moore, how may I assist you?

USER: Owing to an emergency I would like to cancel my existing reservation, please help me with it.

ASSISTANT: Sure, I'm here to help you.

USER: Thank you.

ASSISTANT: hold on for a moment please.

USER: Sure, take your time.

ASSISTANT: Sorry Gary, there are no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us. Have a safe day.

USER: Thank you for your service.

ASSISTANT: Welcome.