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.
"Invitations came quicker than expected. Design is simple yet sophisticated. I really liked that I could change colors and fonts. I love that the design team sends a proof with recommendations! Very high quality paper."
"They invitations look great! It was so easy, from start to finish. I will definitely be recommending this website to my friends. Thank you!"