Here you reserve a seat in any workshop you are interested in. For this reservation to be valid you need to have registered to the conference and use the same name as in your registration.
*The “price” for the workshops is always zero (0.00) but is needed for the system to register your reservation. You will not be charged anything, nor you will be asked to enter any payment details to complete your “purchase”. However, you need to enter your name, the one you registered to the conference with.