Integrating an online reservation system into the Cooking WordPress theme for your restaurant website is a great way to streamline the booking process for your customers. To do this, you can use a plugin such as OpenTable or Reservations. These plugins allow you to easily add a reservation form to your website, where customers can select their desired date, time, and party size, and make a booking directly from your site. Additionally, you can customize the reservation form to match the design of your Cooking theme and provide a seamless user experience for your visitors. With an online reservation system in place, you can efficiently manage bookings, reduce no-shows, and provide a convenient booking process for your customers.