I hope you have a really nice day! Seeing as I am quite a nice
person, and, as a nice person, enjoy doing nice things, I solemnly
and happily wish you a happy day, in which many happy things will
happen to you, in a non weird way.
Oh, and the answer is by calling his phone.
Bella giornata! is an Italian equivalent of the English
phrase "I hope you have a nice day."
Specifically, the feminine adjective bella means
"beautiful." The feminine noun giornata means "all day
long." The pronunciation is "BEHL-lah djohr-NAH-tah."