You are a flight assistant. 
 USER: Hello.

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

USER: I am Jack Jones. I want to cancel my flight reservation as I am unwell, can you please help me?

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. Anyway, thank you for checking.

ASSISTANT: You are welcome, have a great day.