Luke 19:31

And if any one ask you, Why do ye loose him? thus shall ye say, The Lord hath need of him. And they that were sent went away, and found even as he had said unto them. And as they were loosing the colt, the owners thereof said unto them, Why loose ye the colt? And they said, The Lord hath need of him.

It is clear that Luke intended his readers to conclude that Jesus possessed omniscience, the event unfolding exactly as Jesus had said that it would. If Jesus had prearranged this, the owner would not have asked this question. A well-known pseudocon, based on Mark's saying that "certain of them that stood there" questioned the disciples, whereas Luke stated that "the owners" did so, barely deserves notice. The same persons are referred to in both cases; the owners were "standing there."