Which excerpt from Brighton Beach Memoirs is an example of dialogue?

Brighton Beach, New York. September 1937. A wooden frame house, not too far from the beach.
EUGENE (Slams the ball into his glove angrily. Then he cups his hands, making a megaphone out of it and announces to the grandstands)
LAURIE Mom, can I have a glass of lemonade?
BLANCHE It’ll spoil your dinner, darling.
On an imaginary pitcher’s mound, facing left, he looks back over his shoulder to an imaginary runner on second.