What does the woman want to buy?

M: Good morning, madam.
W: Good morning.
M: Can I help you?
W: Yes, I’ m trying to find some shoes. You see, do you have any shoes like these?
M: What size?
W: Size twenty-four.
M: What kind of color do you want?
W: Dark blue.
M: I’ m sorry. We have the size you want but we don’t have this color. We only have black ones now.
W: But my friend told me that she bought this pair of shoes last week.
M: Yeah. We had them last week, but the white pairs are now sold out as well as dark blue. I’ m so sorry.