Even if your job makes you say something 150 times a day, never lose sight of the fact that it may be the first time your audience is hearing it.
I think about that every time I’m shopping in a store and the cashier or an employee on the PA mumbles “thank you for shopping with us.” They don’t mean it. They don’t even try to pretend that they mean it. It’s something they’ve been told to say, so they say it with no enthusiasm.