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 had a special request for these cards. The design team personalized these cards for me just how I wanted/needed them! I couldn't be more happy with the outcome!"
"I really loved the design--it was so cute & the printing quality was excellent. The paper quality surprised me at how nice it was! I love this invitation!"