You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Karen Scott. Due to health problem, I want to cancel my reservation. Could you please help me for that?

ASSISTANT: Sure, please let me check.

USER: Ok.

ASSISTANT: Sorry, I found no reservation under your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us, take care.