Why don't we....

Peter: Where do you want to go for lunch?

Mary: I don't know. Why don't we go to Da Vinci Restaurant?

Peter: Pasta again? I don't like their pasta because It's too salty.

Mary: You're right. It's saltier than the pasta at Sicilia Restaurant.

Peter: Well, I still want to go out. How about the Arabian Restaurant downtown?

Mary: Ok, let´s go.