'Thank you so much for the awesome balloon bouqet. It was a huge hit!!'
'The flowers were beautiful and deleievered on-time. Thank you@!'
'Ordered on line in late evening. Liked web site display of arrangement. Confusion due to 2 confirmations sent to me with 2 different conf.numbers. Called customer service so as not to same order billed and filled twice. Very satisfied with flowers sent.'
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.