Step 1. Type "Static HTML" in the Facebook search bar and click on "Add Static HTML to a Page"
Step 2. Add Static HTML: iFrame tabs to your Facebook page by selecting your page and clicking on "Add Page Tab"
Step 3. Change Tab name to reservation in the "Tab name & image" tab then, paste the script into a page content control:
Et voila! You have this new reservations tab on your Facebook page!
You can check our demo Facebook page here: https://www.facebook.com/hostmedemo