Greetings - Saludos
Hello: Buenos Dias (plural), in latin america you can sometimes say only: Buenas.
Good evening: Buenas Tardes, tarde is a feminine word, Dia is masculine.
Good night: Buenas noches.
How are you? if you don't know the person you will say: Como esta Usted?, if you know her or him: Como estas?
Fine, thank you: Bien gracias. In Spain the letters "c" and "z" are like the english "th", in latin america like a normal "s" .
Sir: Señor
Madam: Señora
Miss: Señorita
What is your name? Como se llama? polite and respectful form.
Como te llamas? with young people or friends.
My name is....: Me llamo... (I call myself...)
Nice to meet you: Mucho gusto.
