$is_available = true; // Untill proven otherwise
            while ( have_rows('availabilitieslist', $postid) ) {
                the_row();

                if( get_sub_field( 'availability_available', $postid ) == 0 ) {
                    // Try dates to check if they overlap with booked dates
                    $availability_from = str_replace( '-', '', get_sub_field('availability_from', $postid) );
                    $availability_to = str_replace( '-', '', get_sub_field('availability_to', $postid) );
                    if( $checkin >=  $availability_from && $checkout <= $availability_to ) {
                        $is_available = false;
                    }

                    if( $checkin >=  $availability_from && $checkin <= $availability_to ) {
                        $is_available = false;
                    }

                    if( $checkout >=  $availability_from && $checkout <= $availability_to ) {
                        $is_available = false;
                    }


                }

            }