You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Karen Moore.

ASSISTANT: Karen, how can I assist you now?

USER: Due to my ill health, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: Sure, I will help you. Please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found under your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Most welcome.