Buenas dias = Zao! Good day.
Como esta? = Ni(nee) Hao(how) Ma?(ma) How are you?
No lo se = May wen ti(tee) I don’t know it.
May wen ti is the Mandarin informal equivalent for "No problem"...thus my correction in #17.
Informally, wo bu ji dao is close to no lo se...I don't know.
Me being a mai gua(American) I get by with a lot of really bad Mandarin...but my Tai yu (Taiwanese) is coming along.