<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<title>Chat Box</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lato">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="chatbox.css">
</head>
<body>
<div class="chatbox chatbox--tray chatbox--empty">
<div class="chatbox__title">
<h5><a href="#">Customer Service</a></h5>
<button class="chatbox__title__tray">
<span></span>
</button>
<button class="chatbox__title__close">
<span>
<svg viewBox="0 0 12 12" width="12px" height="12px">
<line stroke="#FFFFFF" x1="11.75" y1="0.25" x2="0.25" y2="11.75"></line>
<line stroke="#FFFFFF" x1="11.75" y1="11.75" x2="0.25" y2="0.25"></line>
</svg>
</span>
</button>
</div>
<div class="chatbox__body">
<div class="chatbox__body__message chatbox__body__message--left">
<img src="https://s3.amazonaws.com/uifaces/faces/twitter/brad_frost/128.jpg" alt="Picture">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="chatbox__body__message chatbox__body__message--right">
<img src="https://s3.amazonaws.com/uifaces/faces/twitter/arashmil/128.jpg" alt="Picture">
<p>Nulla vel turpis vulputate, tincidunt lectus sed, porta arcu.</p>