'Excellent service. Card was exactly as requested. Those sending the arrangement commented on the message and how the arrangement was true to what was expected.'
'Beautiful arrangement. Delivered on time. Excellent service.'
'Great service. Easy website to navigate. I am very impressed with the updates and information as to the status of my order. Thank you very 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.