You can easily add the booking form on your Wix site:
When logged in at WIX:
1. Click Add, from the left tool bar.
2. From the Add list, click Apps. Click HTML.
3. From the HTML Settings window, under Mode, click the drop-down menu and select HTML code
4. Under HTML/embed code, type or paste your HTML code.
5. Click Update.
6. Click outside of the HTML Add on to close the HTML Settings window.