Here in the US we have something called "Open Table". It is a website that lets you book restaurant reservations on line.
Does Italy have this type of website?

https://www.quandoo.it/en

http://www.thefork.it/

I once booked a restaurant in Italy though quandoo -- the restuarant offered the option on its website -- and even though I received a confirmation of the reservation from quandoo, I called they restaurant and they told me they had never received it. I never risked using it again. It is simpler to just call the restaurant.

Oh, I'm glad to hear that The Fork is in Italy. We used it all the time in Paris!