Read it through once

Eliza asks for the price of a bunch of flowers; Higgins, with professional curiosity, bargains with her as if he were analyzing her speech. The flower-girl's wit and self-respect are evident as she resists being flattered and refuses to be conned. She confesses that she pays little for her education, and that she is taught by 'the streets' and 'the gutters'. A vulgar young man — Freddy — stalks in and offers to escort her, but she repels him, not from virtue but from shrewdness. Higgins and Pickering observe; Pickering is amused and interested sympathetically; Higgins is keenly fascinated and proposes a wager: that he can transform the girl into a lady in six months by teaching her to speak properly.