hi! just like MMM said he gave you a few... hears the rest if you want them!
(in romanji if you cant read japanese)
1.Ohayoo Gozaimasu, (more polite than just ohayoo)
2.Konnichiwa
3.Konbanwa
4.Genki desu ka? Hai, genki desu!
5.kuon desu, (or "watashi wa kuon desu", I am... or "watshi no namae wa kuon desu", my name is....)
6.onamae wa nan desu ka?
7.doozo yoroshiku, or yoroshiku onegaishimasu, (more polite than doozo yoroshiku).
8. kyoo wa samui desu.
9.oyasumi, or oyasuminasai, (more polite than oyasumi)
hope it helps!