You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself Lisa Johnson. I want to cancel my reservation, could you help me out?

ASSISTANT: Sure Lisa, give me a minute to check.

USER: OK.

ASSISTANT: Sorry Lisa, unfortunately there is no reservation found under your name.

USER: It's fine. Thank you for your immediate reply.

ASSISTANT: Thank you, have a good day.