On Shabbat, the gabbai calls the kohen to the Torah with the following formula: ויעזור ויגן ויושיע לכל החוסים בו ונאמר אמן. הכל הבו גודל... I have never heard anyone say amen after the prompt. ...
When people are called up to the Torah by name, often there is a title that goes with them, such as "ha-bachur" for a young man, "ha-rav" for a rabbi (and/or someone with semicha), and other such ...