List of child pages on page

page_list.php

$page_ID = $post->ID;

$args = array(
    'child_of' => $page_ID,
    // 'authors' => '',
    // 'date_format' => '',
    'depth' => 1
    // 'echo' => '',
    // 'exclude' => '',
    // 'include' => '',
    // 'link_after' => '',
    // 'link_before' => '',
    // 'post_type' => '',
    // 'post_status' => '',
    // 'show_date' => '',
    // 'sort_column' => '',
    // 'title_li' => '',
    // 'walker' => ''
);
wp_list_pages($args);