"Καλησπέρα, ευχαριστώ."

Translation: Good evening, thank you.

[EMILIA_MARIE]

good afternoon, thanks

[fotiosgaridis]

Good afternoon = Καλό απόγευμα

[Lng52-._]

Can you also say: "Καλησπέρα, σας ευχαριστώ?

[uEvc3]

That's the formal way of saying it. Informally you can drop the σας.

[fotiosgaridis]

Now it's accepted! Thanks for your feedback.