How to pronounce“betty boop”in English

I arrive in the evening, just in time to catch dinner at one of the first restaurants in this half built metropolis. It's an American style diner and I'm their only customer. Thereare pictures of Lucille Ball and Betty Boop on the walls and the floor is covered in black and white checkerboard tiles.When they bring my food, they slide bottles of French's yellow mustard and Heinz tomato ketchup onto the countertop of my red leather booth. This could be New York in the 1950s.