What does Walter ultimately tell Mr. Lindner?

In Lorraine Hansberry's play "A Raisin in the Sun," Walter Lee Younger does not have a direct and meaningful conversation with Mr. Lindner.

In the play, Mr. Lindner represents a group of white community residents seeking to prevent the Younger family from moving into a white neighborhood. He approaches the Younger family to offer them money to buy their house back and dissuade them from moving.

When Mr. Lindner arrives, Walter is not home. Instead, it is his mother, Lena, and sister, Beneatha, who engage in conversation with Mr. Lindner. While they firmly decline his offer, Walter never engages directly with Mr. Lindner in the play.