You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Ok, please share me your name.

USER: My name is Charles Williams.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: That's ok, thank you for the response.

ASSISTANT: Welcome, have a nice day.