Since it's the restaurant, it would require az: "Itt nincs az étterem" or "Az étterem nincs itt", etc.
Why can't learn little easier? This way i can go to school and learn Hungarian 3 years.
Even if you have a "personal Hungarian trainer" it will take you many years to see through the many difficulties of this beautiful language! And when you start talking to Hungarians, you will find out how difficult it really is...