'Left them at the front door as I asked. She received them without any problems two hours later. Well done, thank you!'
'Thank you guys so much. I will be recommending my friends and family to you guys. Great job.'
'The recipient called and said the flowers were beautiful. They were delivered promptly.'
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.