'Thank you for helping us to show our love and support to the family.'
'Thank you so much for the outstanding service! This my new favorite method of ordering flowers!!! You have a new loyal customer in me!!!'
'This was a great service. Saved a trip to my local florist. Will order like this next time. Arrangement was just beautiful. 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.