You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure, I will help you in cancelling. Give me a moment.

USER: Ok, take your time.

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

USER: It's ok, thank you.

ASSISTANT: Welcome.