The problem is that your quote sounds quite generic.
A (wild) guess: one of the Ishar games? I recall NPCs do interact with you, and some NPCs ask you to take them with you...

Might & Magic I?

Drlstvaan is correct!
The quote is from the Ishar I, when an outdoor NPC ask to join you!

Great!
Here's the new quote.
"Excellent! Now bring me the other artifact, and we can begin the invocation ceremony."

It is from Titan Quest: Immortal Throne?

To ease the guessing, here's an other quote from the same person.
"Why, this... this cannot be! How could we fail? All that we tried to accomplish has been in vain."
If there's no correct guess when I come back (tomorrow around noon CET), I'll post a final quote and then reveal the solution after some more time.
EDIT
We have a winner! Villodre, it's your turn. (It's just that you posted while I was typing.)

OK, then I'll post a good known one:
The non-believers climbed for days to confront the master in the mountains.
- Where do you get your so-called faith?, they asked.
- You brought it, the master replied. You've all climbed so high.

Syndicate Wars.
I know I'm right so I'll go ahead and say mine. This is a free game on a website, and it may be to obscure but I'll try anyways.
"You cannot get ye flask"

@sk8ing667
Correct! Nice guess
That's from a text adevnture, I recall... but not exactly which one

That there's from Strongbad's Cool Game for Attractive People... or some other Homestar Runner game. I think that reference comes up in more than one.
My turn:
"DECAPITATIOOOOON!"

Just thought I'd say you are correct. However, the quote was originally from Thy Dungeonman, a homestarrunner text adventure spoof.

@Prator
Brütal Legend, no doubt :P

Ho yeah. Your turn.
EDIT: Unless you don't post in time...

This "time", in reality, depends on when does somebody decide to liven up this thread by posting a new quote, regardless of whose turn it is. It's not determined that in 5-8 hours someone will snatch the turn.
For example, there was a day between makodo's riddle and Villodre's post.

Point taken. In that case, I'm taking a turn:
"They're aiming for my ass!"
I can never take that line seriously...