BOA TARDE - You say in the afternoon
BOA NOITE - You say in the evening
TUDO BEM? - Ask how is the person
COMO VAI VOCÊ? - Ask how is the person
TUDO CERTO! - Answer that everything is right
ATÉ LOGO! - You use to say see you soon
ATÉ MAIS TARDE - You use to say see you later
TCHAU! - Answer to say bye
OI - You use to say hi