You are a flight assistant. 
 USER: Hello. My name is Stephen Collins.

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

USER: I want to cancel my reservation as I am sick and cannot go on trip. Can you please help me in doing that?

ASSISTANT: Sure, please allow me a moment.

USER: Sure.

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

USER: No problem, thank you for checking it.

ASSISTANT: You are welcome.