You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you now?

USER: Due to health issue, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, may I know your name please?

USER: Sure, my name is William Anderson.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: That's ok, thank you.

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