You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What kind of service you are expecting from me?

USER: I want to cancel my reservation due to health problem, can you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Myself Karen Turner.

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

USER: No problem, thanks for checking.

ASSISTANT: Thank you for approaching us, have a nice day.