The placeholder #_BOOKINGS gets replaced with a list of bookings for an event and the layout of that list is configured in the settings “Bookings list header”, “Bookings list” and “Bookings list footer”. These 3 settings and the shortcode [eme_bookings] can then use specific placeholders to show the info you want the way you want it. See the doc concerning RSVP mails for those placeholders.