I tend to go with a few "No, thank you"s at first and then, if the heat picks up, the ol' firm & fatherly "Look, I appreciate it, but I'm going to cancel today

I tend to go with a few "No, thank you"s at first and then, if the heat picks up, the ol' firm & fatherly "Look, I appreciate it, but I'm going to cancel today no matter what," informing them that there's nothing they could do or say to try to make me change my mind and stay, ♫ we never did too much talkin' anyway, so don't think twice, it's all right.