Quick question on a query…

How can I query only the pages that use “Services” as a parent? Another option is to query pages using “services.php” as a page template? Either one should work.

I got this working fine, but I can only get it to bring back ALL my pages, or just one specific page.

<?php query_posts('post_type=page&pagename=services&order=asc'); ?>

Thanks a bunch.