You are a flight assistant. 
 USER: Hello. I am Anthony King.

ASSISTANT: Hello, do you need any help from us?

USER: I need to cancel my reservation, can you render with my concern?

ASSISTANT: Sure, please allow me a moment. Sorry, there is no reservation matching with your name in our portal to cancel further.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: You are welcome.