You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, can I know your name?

USER: Ok, I am Carol Hill.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.