public static boolean removeReservation(int userid, int eventid) {
        try {
            Connection con = DB.getConnection();
            PreparedStatement ps = con.prepareStatement(REMOVERESERVATION);
            ps.setInt(1, userid);
            ps.setInt(2, eventid);
            int result = ps.executeUpdate();
            if (result > 0) {
                return true;
            }

        } catch (Exception ex) {
        }
        return false;
    }