'Flowers were beautiful - fresh and lovely - they reflected exactly the love/loss of a special childhood friend which I felt in my mourning heart and which I couldn't express in words. Thank you.'
'The plant was absolutely beautiful! Even nicer than the picture! The woman who took the order was so helpful and sweet. A very pleasant experience!'
'You did an awesome job!!! I will use your services in the future. Thank you for letting me know that the flower was delivered in time.'
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.