You are a flight assistant. 
 USER: Hello. My name is Helen Wilson.

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

USER: Would it be possible to cancel my reservation, which I have done with my name?

ASSISTANT: Sure, please allow me a moment.

USER: Sure.

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

USER: Not to worry, thank you.

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

USER: Thank you for the information.

ASSISTANT: You are welcome, have a great day.