Hello,
im the native of Bengali language. I'm writing u the greeting into bengali-
Good morning - Shuvi Sokal
Good afternoon - Shuvo Bikal
Good evening - Shuvo Shondha
Good day - Shuvo din
How are you today? - kemon aso aaj?
It's nice to meet you - Tomar shate dekha hoye valo laglo.