Adding content to the Booking Confirmation page

Hello,
I would like to add a module or some custom html to the Booking # confirmation page that loads once a person submits a booking request. Where can I do this? OS Booking seems to translate it's own module configuration, and I'd like to add a banner module to that booking page with some additional information and a link to a form where we ask for more information (need to link to a Google form in order to have it integrated wth all other client systems.

How can I add content to this?



Thank you.