'The plant basket was lovely.'
'Excellent selection and ease of ordering. Delivery was on time and prompt notification. I highly recommend your company.'
'This was the easiest way to send flowers. To know with confidence they will be delivered to the correct place and quickly. The process is so convenient. Great option.'
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.