What is a common phrase used often in spanish?

gracias que tengas un buen día(thank you have a nice day) is in my opinion the most common phrase and easiest to learn to a non-speaking spanish person.

The common phrase used often in Spanish would be,

English                              Spanish

Good morning                 Buenos días.

Good afternoon.             Buenas tardes.

Good evening.                Buenas noches.

Hello, my name is ___.  Hola, me llamo ___.