'Ordering was easy. There was a good selection to from which to choose. Delivery was on time. The recipient was very happy with the flowers!'
'I happened to see the flowers at the funeral and they were just as ordered and expected. Thank you for your help!'
'I thank you for your timely delivery!'
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.