'Thank you for your help. I live out-of-state and wanted to send flowers for my cousin's funeral.'
'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!'
'Great service...quick and reliable. I got compliments on the flowers! Will use again if needed.'
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.