You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Nicholas Collins. I would cancel my reservation, could you help me out?

ASSISTANT: Sure, please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to cancel.

USER: Thank you, have a good day.

ASSISTANT: Thank you for consulting us, have a great day.