user: Question: What school in Dalefield has a roll less than 81?
Columns: ['Name', 'Years', 'Gender', 'Area', 'Authority', 'Decile', 'Roll']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Carterton School', '1–8', 'Coed', 'Carterton', 'State', 4.0, 356.0]
SQL:

assistant: SELECT "Name" FROM "Table" WHERE "Roll" < 81.0 AND "Area" = 'Dalefield';