Change Confirmation page heading

Hi!

I’m wondering if there is any way to change the confirmation page heading from “Thank you! Your appointment is booked: ” to something custom. It seems this is rendered directly in a compiled javascript file, making it hard to hook in to customize the text with WordPress filters or javascript event listeners.

We’d like to start adding this plugin to a number of our client sites but confirming that it will be customizable enough to support long term. Thanks,