Ciao-- generic greeting for hello or goodbye
Bon Giorno- Good morning
Buona Sera- Good evening - may be used to greet someone
Buona Notte- Good night- a more final greeting signifying that you are leaving for the night.
Ti Voglio Bene- I like you very much, I love you.
Ti Amo- I Love You
Altretanto--Likewise and more--a typical response to a compliment to someone you hold in high esteem.
In Bocc'al lupo-- in the mouth of the wolf-- best wishes or good luck - harkens back to Romulus and Remus and signifies that you are protected and safe as a cub in the mouth of a mother wolf.
Chiacchiere- a word that literally means to chat, gab... fare due chiacchere- to have a chat .. this often used to describe or invite someone to go out for coffee, etc. and chat about something or nothing in particular.