MATD booking

Question

Hi :)
Yesterday, I've made a registration for MATD notion on 22 and 23/11, unfortunately, i have been booked as well for a meeting on the 22 that i can't miss. on the faq i read that i will be possible to cancel via the e mail i received, i cancel the booking on my outlook schedule but i'm not sure that my booking has been cancelled
tks, in doubt i'm going to make a new booking later.
Raphaël