Auto insert the customer name in a bbPress reply

Hi_script

// ==UserScript==
// @name         Hi-Automatic!
// @namespace    http://alaasalama.com/
// @version      1.0
// @description  Adding Hi+Name automatic for Themify support forums
// @author       Alaa.Salama
// @include      https://themify.me/forum/*
// @grant        none
// @require      https://code.jquery.com/jquery-2.2.4.min.js
// ==/UserScript==

(function() {
    'use strict';

    // Your code here...
    var client_name = jQuery(".bbp-replies li:nth-child(3) a.bbp-author-name").text();
    jQuery("body.single-topic #bbp_reply_content").append("Hi "+ client_name + "," + "\n");
})();