The President was 'assisted' with his speech. = The President was 'assisted' in writing his speech.
a doctor who has been involved in several 'assisted suicides'
Another doctor 'assisted' him with the operation.
(..) what all this mean, - but I won't fail him. - You're afraid, Draco. You attempt to consider, but it's obvious, - let me assist you. - No. I was chosen. This is my moment. Unbreakable Vow. You sure that's what Snape said? (..)2009 Harry Potter and the Half-Blood Prince