Hi! -Yaa.
Good morning! -Ohayou gozaimasu.
Good evening! -Konbanw
Welcome! (to greet someone) - Youkoso irasshai mashita.
Good night! -Oyasumi nasai.
See you later! -Mata atode aimashou!
Good bye! -Sayonara!
Happy birthday!-Tanjyoubi omedetou gozaimasu!
Happy new year!-Akemashite omedetou gozaimasu.
Merry Christmas!- Merii Kurisumasu! *8
Congratulations!-Omedetou!
Good night and sweet dreams- Oyasumi nasai
Happy Anniversary!-Happii anibaasarii!
Happy 27th Anniversary, sweetheart!-Happii 27th anibaasarii, suiitohaato!
Happy Valentine's Day.-Happii barentain.
How are you? -Ogenki desuka?
I'm fine, thanks! -Watashi wa genki desu. Arigato!
And you? -Anatawa?
Good/ So-So. -Genki desu. / maa-maa desu.
Thank you (very much)! -Arigatou!
You're welcome! (for "thank you") -Dou itashi mashite.
I missed you so much! -Samishi katta desu.
What's new? -Saikin dou desuka?
Nothing much -Kawari nai desu.
I'm lost -Mayotte shimai mashita.