You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I'm Janet Thomas. I want to cancel my reservation, can you help me out?

ASSISTANT: Sure, just wait a while to check.

USER: OK.

ASSISTANT: Sorry Thomas, unfortunately there is no reservation found under your name in our database.

USER: Thank you for your immediate reply.

ASSISTANT: Thank you, have a good day.