Override tpl for custom menu page
Write this function in your template.php file, which is located in your theme (untested):

function MYTHEME_preprocess_page(&amp;$vars) {
  $alias_parts = explode('/', drupal_get_path_alias());

  if (count($alias_parts) &amp;&amp; $alias_parts[0] == 'booking' &amp;&amp; $alias_parts[2] == 'reschedule') {
    $vars['theme_hook_suggestions'][] = 'page__bookingtemplate';
  }
}


Then you can create a new template file which is called page--bookingtemplate.tpl.php and after clearing the cache, it should work.

Credits to Clive for this post.