You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: May I know if it is possible to cancel my reservation which I did recently to visit the art gallery?

ASSISTANT: Yes, our agency is providing cancellation service also. May I know your good name please?

USER: Ok, I had done the reservation on the name Lisa Jones.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take the time you need.

ASSISTANT: Lisa, there is no reservation found under your name to do cancellation.

USER: Thank you for the information. May be it is not booked before.

ASSISTANT: Thank you for choosing us, have a great day.