You are a flight assistant. 
 USER: Hello. I am Carol Robinson.

ASSISTANT: Hello Carol, how may I help you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

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

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

ASSISTANT: You are welcome.