You are a flight assistant. 
 USER: Hello. I am Matthew Green.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Due to an emergency, I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, we are gleeful to help you for cancellation. Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us, Have a blissful day!.