Yes, we understand that things come up during the Summer. Please email us with the date you want to cancel and indicate your new preferred date. We will cancel your reservation and register you for the other date if it is still open. Do not register for another session online, this will lead to confusion and being registered and charged for two Orientation dates. Please note that once your cancel your reservation the reservation system automatically opens a spot in that date and someone else can register for that spot. So please be sure and check dates before cancelling anything.