In this code, the checkBookings() function is used to validate the input URL. If the URL includes 'www.bookatable.com' or 'www.opentable.com', it indicates that a booking has already been made. Otherwise, it means that no booking has been made yet. The user will be notified accordingly based on the input URL.
Please note that this solution assumes that the restaurant's website follows a standard format similar to bookatable.com or opentable.com. It may not work accurately for websites with a different URL structure. Additionally, it does not check for real-time booking status; it only verifies the URL pattern.
