You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I'm Linda Williams. I want to cancel my reservation because of some health issue, can you please help me with that?

ASSISTANT: Sure, I will help you with this. Please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry Williams, there is no reservation found as per your name to cancel your reservation.

USER: That's ok, thank you for your service.

ASSISTANT: You are welcome and hope you have we will meet again.