<!-- Load Facebook SDK for JavaScript -->
<div id="fb-root"></div>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = 'https://connect.facebook.net/it_IT/sdk/xfbml.customerchat.js#xfbml=1&version=v2.12&autoLogAppEvents=1';
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>

<!-- Your customer chat code -->
<div class="fb-customerchat"
attribution=install_email
page_id="1582894571734259"
logged_in_greeting="Ciao, come posso aiutarti? :D"
logged_out_greeting="Ciao, come posso aiutarti? :D">
</div>