I need a customized checkout page in woocommerce

Hello, this is really urgent and needs to be done tonight/today/asap : My site is using a special booking system (theme based) and so I changed the woocommerce page that is normally meant to be a real chekout page to a "pre-booking" page. Now the problem is that i also have a membership system so that when partners want to pay they get redirected to this "booking" page which is not what I want. So I would like to have a customized woo checkout page .
To be clearer maybe : I need 2 different checkout pages (with different fields and "thank you message")
I'll provide all details and access in a separte document (login etc.)
Thanks in advance