My wife's birthday is today . I need some flowers .   We have lots of fresh red roses .   How much do the roses cost ?   $ 20 a dozen .   That sounds good . Last year I paid $ 30 .   Yes , you came here on the right day . They're on sale today .   Give me a dozen .   Very good . Would you like anything else ?   No , I'll just give her the roses and a card . 