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 this thankyou card. The paper quality was perfect. The colors was a perfect fit for my purple, yellow, and white wedding."
"I cannot wait to start sending out thank you’s on these beautiful cards. They are such good quality, and they are gorgeous! The gold shimmer envelopes are just perfect!! Love love love!!"