Phrases Asking for and Giving Permission

I was wondering if I could...

Meaning

A polite and indirect way of asking permission.

Translation language

John: Excuse me, Sir. <b>I was wondering if I could</b> speak to you for a moment?
Alice: Of course.
John: Thank you for your time.
Alice: You're welcome. <b>I was wondering if I could</b> also ask you a couple of questions?