bad attitude

I was shocked at the service I received from pretty , as I was about to pay a white old lady was standing in front of me , she was offered a plastic bag and asked how she was , she was helped with a smile oh and yes she got a greeting .. then it was my turn , she made no eye contact with me , no offers , no smile and no greeting . handed me my change with no Acknowledgment of my presents at all . yes Im black and yes I might be young but give me the same service you give to white people PRETTY !!! Damit ... so Disappointed ..