This is the 5096th most frequent Polish word.
prosić
"Prosić" means "to ask" or "to request."
In this sentence, 'prosić' is used in the present tense 'proszę' to express a polite request for assistance.
Proszę o pomoc w rozwiązaniu tego zadania.
I am asking for help to solve this task.
Here, 'prosić' is used similarly, forming a polite inquiry requesting the action of serving coffee.
Czy mogę prosić o podanie kawy?
May I ask for a coffee to be served?
In this case, 'prosić' is in the past tense 'poprosił', indicating a completed action of requesting someone to do something.