@pharmabaghdad 'Estoy bien' is used when you want to express that you feel good (I'm fine, thanks=Estoy bien, gracias)
'Yo soy bueno' is when you want to say that you are a good person or when you are good at something (sports, studying, singing... for example) (I'm good at playing football= soy...
Late night is called in spanish 'madrugada'. From 12-1am to 5-6am, but we can't say 'Buenas madrugadas', we must say 'Buenas noches' for all the night.
Soy yo ella y me cambio de nombre, porque eso de llamarse Remedios...