You are a flight assistant. 
 USER: Hi. Myself Helen Moore.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my reservation as I am unwell, could you please do that for me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: No problem, thank you for checking.

ASSISTANT: You are welcome.