The seats I want to purchase are marked in gray Only seats marked in any color other than light gray are available for purchase. Related articles I have a coupon/discount/concession from my credit card company, how do I use it? How do I make a booking? There are no tickets available - can you contact me if more come on sale? Error Message - "This code has already been used, try to enter different code" Why is there a time limit when I book tickets online?