Certainly, here's an improved version of your message:
"Our tour is proudly endorsed by the Tourism Company of Puerto Rico. Out of 700 tour guides, only 17 have this endorsement—and our company has two of them! We guarantee a unique experience: if you find another tour guide offering the same as we do, your tour is free!
You'll enjoy the comfort of our new vehicle and we will capture many photos for you at no extra charge. We will also take you to dine at the best local seafood restaurant in town. Join us in Arecibo to explore the beautiful Indian Cave and learn about the fascinating pre-Taino hieroglyphics and their historical significance."
