On the Find tab of RoomSync, each potential roommate can either be 'Liked' or 'Skipped'. Your answer is anonymous to them until both of you 'Like' each other. When there is a mutual 'Like', we will notify you and you can start a conversation about being roommates. A mutual like is not the same as becoming roommates on RoomSync. You will need to request someone as a roommate to be officially matched.
You can always update your answer from the Find tab by tapping the Saved icon on the top left. Within Saved you can move people from 'Liked' to 'Skipped' and vice versa at any time.