I use the follwing code on ThemeForest to add pre replies templates for the comments section, more info here https://mo3aser.com/?p=4129

Envato-replies-template-codes.js

/* Append the Custom Styles */
var css = '.banner{display:none !important}.comment__header{margin-bottom:1em!important}.comment__header small{clear:both!important;display:block!important}.comment__meta{padding-top:5px!important;}.headerstrip .is-hidden-tablet-and-below{padding:0!important;}.headerstrip__content--desktop{height:60px!important;padding-top:0!important;}.item-grid>li{width:139px!important;}.theme-label-Jannah{background:#00b8ff!important;}.theme-label-Jarida{background:#c70000!important;}.theme-label-Sahifa{background:orange!important;}.theme-label-name{float:right!important;font-size:16px!important;margin-left:10px!important;padding:8px 10px!important}.user-info-header__user-details{overflow:hidden!important}',
		head = document.head || document.getElementsByTagName('head')[0],
		style = document.createElement('style');

head.appendChild(style);
style.appendChild(document.createTextNode(css));

/* */
jQuery('.comment__initial').each(function() {
		
	var itemName = jQuery(this).find( '.comment__header small a' ).text(),
	    itemName = itemName.substr(0, itemName.indexOf(' ')),
	    clientName = jQuery(this).find( '.comment__username' ).text();
		
	if( jQuery(this).find( '.e-text-label' ).length ){

			jQuery(this).parent().find('textarea').height(280).val( '\
Hi @'+ clientName +'!\n\n\
Thanks for using '+ itemName +'. \n\n\n\n\
If you have any further questions or need assistance please create a support ticket using the link below and our support team will gladly assist and guide you \n\n\
<strong><a href="http://tielabs.com/help/">Click Here To Create An Account &amp; Get Support</a></strong> \n\n\
Thank you, we look forward to serving you!\n\n\
Best Regards.' );
	}
	else{
		jQuery(this).parent().find('textarea').height(200).val( '\
Hi @'+ clientName +'!\n\n\
Thanks for your interest in '+ itemName +'. \n\n\n\n\
if you have any more question please do not hesitate to contact us.\n\n\
Thank you, we look forward to serving you!\n\n\
Best Regards.' );
	}
	
	
	jQuery(this).find( '.comment__username' ).after(' <span class="e-text-label -color-grey-dark -size-s theme-label-name theme-label-'+itemName+'">'+ itemName +'</span>');

});