Some phrases mean much more than the sum of their words. These are the ones Marina hears every single day:

Finnish	Literally	English
Ei se mitään.	it's not anything	Never mind. / No worries. / It's fine.
Ihan sama.	quite the same	Whatever. / I don't mind.
Ei hätää.	no emergency	No worries. / No rush.
Voi ei!	oh no	Oh no!
Ei voi olla totta!	it can't be true	You're kidding! / No way!
Pidän peukkuja!	I'll hold thumbs	I'll keep my fingers crossed!
Hyvää jatkoa!	good continuation	Have a good one! / All the best!
Onnea matkaan!	luck to the journey	Good luck!

Ei se mitään is the classic reply to anteeksi (sorry) — exactly like English never mind or don't worry about it.