seller: Hello. Can i help you?
you: I must buy black shoes.
seller: So these shoes.
you: How much?
seller: 20 $
you: But i only have 17 $
seller: Sorry, we couldn't help you
you: But i should buy these shoes. These present for my brother.
seller: So for these we can doing salle. You can buy these shoes for 17 $
you: Thank you very much. You help me.
seller: Please, come again.
you: Bay, good luck.
