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 used this item sort of backward and nontraditionally. I made my big invitation for the reception due to inviting everyone there. I wanted to keep the ceremony more private, so I chose to use this Details card as a private Ceremony invite for immediate family. Since I was only getting a small number, I rounded the corners. I chose to keep the background color on front and back. I replaced the white, blaze and baltic colors with bay and ivory on blaze background."