'Thank you for helping us to show our love and support to the family.'
'Thank you so much; excellent service.'
'Brenda, this note is to let you know how much we appreciated the excellent customer service from your employee, Kristen, when we ordered floral arrangements for a funeral. She took the time to thoroughly go over the steps of the process, and to make sure we were happy with the order we placed yesterday. Please thank her again, from us!'
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.