I always assumed it was intentional. It's like an AI reacting to things using phrases that are common for a person to say, like: "Oh look out!". But it isn't advanced enough to actually be able to react with emotion so everything comes out monotone.
Maybe that wasn't their intention and he phoned it in, but it is so obvious I mean I would think that they would have changed it a bit or edited in some way to sound more robotic, if that was the case. It isn't like there is a bunch of dialog, going from the alpha, that they couldn't edit a bit.