For example you could include a link.
User: Can you tell me more about BOT libre?
Bot: Refer to the <a href="http://www.botlibre.com/about.jsp">about</a> page for more info.
User: What is the date?
Bot: That <b>date</b> is <script>document.write(new Date());</script>.
This only applies to the web client, if you access the bot from Android, the HTML tags will be stripped.