There are set phrases that they use constantly. The delivery is robotic, not because they can’t speak English obviously, but because it’s being read. This is clear because when having a to and fro conversation (or debate) there is a more natural speech pattern.
I wouldn’t have a problem with this per se if the agents knew the rules. And I should add that when you are in a hurry to nab a seat on anything sensible to counter yet another cancellation, the last thing you need is a long, wordy and overly polite word salad when you’re after quick and decisive action. Meanwhile yet another seat disappears.