It's good to help out a friend in need.
Johnny was starving due to lack of funds, and he asked Elliot for help.
Elliot wants to finish his talk with Johnny.
Elliot helps Johnny out by giving him some of his own food.
Elliot refuses to help Johnny because he's afraid of running out of food himself.
Johnny is grateful to Elliot for helping him out when he needed it.
Johnny finds where to get plenty of food that he needs and doesn't tell Elliot.