'I want to thank you for trying to reach me. I did not get your message till late Monday night, and did not see your email until today. I am sure you guys replaced the flowers I ordered for my cousin...Thank you again..'
'You were great and the flowers made my sister lift her mood. Thank you for sending them to the house instead of the Hospital. You get a double A+ in my book.'
'We will be doing business again, and I will be recommending you to people! Awsome job! Thanks'
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.