Cart Updated/Error message shortcode or function.

I am building a custom wp_cart.php template and I have the forms working correctly (update quantity, apply coupon code, shipping, etc). However I can't find any code to give me the response messages from the form. Expecting things like "Coupon Updated", "Please Enter Valid Email", etc.

I see where this is happening in the default cart, but I don't want to use the default cart. I'm hoping there is a call for this response, as it is the only thing holding up my development at the moment.

The site is still under development and isn't available to show, otherwise I would.