user: Question: How old were Mitchell & Jessica when they danced the Cha-cha-cha?
Columns: ['Date', 'Round', 'Pair', 'Ages', 'Dance', 'Song']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['October 14, 2008', 1.0, 'Mitchell & Jessica', '11 & 10', 'Cha-cha-cha', '" All Star "— Smash Mouth']
SQL:

assistant: SELECT "Ages" FROM "Table" WHERE "Dance" = 'Cha-cha-cha' AND "Pair" = 'Mitchell & Jessica';