"I've booked tickets for Potion Master Severus Snape – Britain – and student," Harry explained to the wizard at the reception and was offered two tickets immediately. Bored, the young man rattled off, "It's prohibited to touch the ingredients and potions on display. Please talk to the available potioneers if you have a question and don't wander into the back rooms. Any and all damage will be charged to your account. There is a shop on the northern side of the building, should you be interested in buying something. Have a nice day."