N4 — outside your level filter

お〜する

お〜するo suruN4formal

write + humble — the speaker does for an esteemed person

o kaki suru

humble — the speaker does for an esteemed person

meaning: write

駅えきまでお書かきするよ。

eki made o kaki suru yo.

I'll write you to the station. neutral

重おもそうですね。お持もちしましょうか。

omosou desu ne. omochi shimashou ka.

That looks heavy — shall I carry it for you? neutral

All examples5

humble — presenting your own act as a service to them

駅えきまでお送おくりしますよ。
eki made o okuri shimasu yo.
I'll escort you to the station. neutral
重おもそうですね。お持もちしましょうか。
omosou desu ne. omochi shimashou ka.
That looks heavy — shall I carry it for you? neutral
詳細しょうさいが決きまり次第しだい、こちらからお知しらせいたします。
shousai ga kimarishidai, kochira kara oshirase itashimasu.
As soon as the details are finalized, we will inform you. formal
受付うけつけから会場かいじょうまでご案内あんないします。
uketsuke kara kaijou made go annai shimasu.
We will show you from the reception desk to the venue. formal
申もうし訳わけございませんが、こちらの資料しりょうはお貸かしできません。
moushiwake gozaimasen ga, kochira no shiryou wa okashi dekimasen.
I'm very sorry, but we are unable to lend out this material. formal

お〜できるo~dekirualternant
お書かきできる
used when you can't do the act (お貸かしできません). The negative is what service Japanese leans on.
お〜いたすo~itasuformal
お書かきいたす
する→いたす inside the wrap, one notch more ceremonious — お届とどけいたします closes a business message.

Only works for acts that touch the honored person (お持もちする, carrying their bag). A solo act like ×お歩あるきする is out.