'Just excellent, quick, efficient and advised me the flowers were delivered. Nice touch.'
'We were all very impressed with flowers, they looked as good as in the advertisement. Well Done. I was not disappointed at all, exactly what I wanted.'
'My girlfriend said that she loved the flowers, that they were so beautiful. Thanks so much.'
You won't be able to dismiss this by usual means (escape or click button), but you can close it programatically based on user choices or actions.