You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, I will help you. Can you please share me your name?

USER: My name is Brian Williams.

ASSISTANT: Ok, please allow me a moment.

USER: Ok, take your time.

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

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.