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.
"I love how nicely this thank you matches my wedding invitations. The quality is great and it includes our new married name! A must get if you ordered the same invitations."
"This was just what we wanted. The font was moved around so it could be clearly seen, which was great. The photo turned out beautiful and the paper was good quality. This is the second card I have ordered, and once again it's been perfect. Thanks"