'We were highly satisfied with your service. The flower was absolutely beautiful. Thank you so much!'
'I ordered the flowers online today early afternoon and was surprised when my friend called less then 2 hours later to tell me she recieved them! Wonderfully fast service! Will definitely use you again.'
'The flowers were very pretty! Thank you.'
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.