'The flowers were lovely and exactly as described. They were delivered on time. Everything was excellent. Will certainly use your service again! Thank you.'
'You did an awesome job!!! I will use your services in the future. Thank you for letting me know that the flower was delivered in time.'
'I was very pleased with your service, will use you again.'
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.