You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you at this moment?

USER: I want to cancel my reservation due to some health issues, so please help me.

ASSISTANT: Sure, we are here to help you with cancellation.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Sure, my name is Carol Williams.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, I will wait.

ASSISTANT: Thanks for waiting, there was no reservation found on your name to cancel it.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching our service.