"For now our chatbot doesn't do anything, we type a message into the textbox, press enter and don't see any result.

Let's change it in this tutorial. Our goal for this tutorial is to make the user message appear on the screen. The code for this feature will be although written in the "send" button click event, but thanks to the shortcut it will also run when we press enter. So, let's edit/update the $("#send").click() function!..."
http://www.mybringback.com/?p=13732