template-thank-you-for-registering.php

<?php
/**
 * Template Name: Thank you for Registering
 */

get_header(); ?>

  <div class="c-page-block">
    <div class="c-grid c-grid--h-center">
      <div class="c-col c-col--8">
        <?php the_field('thank_you_text'); ?>
      </div>
    </div>
  </div>