'Excellent service. The flowers looked great!'
'Thanks for the delivery advice. As it all worked as it says on the 'tin' I can't see how you can improve. Many thanks'
'Thank you for delivering the Peace Lily to the Funeral Home in a timely manner. My family member sent a picture of it and it was perfect! So many many thanks of giving me comfort and peace.'
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.