user: Question: Who was the opponent on June 15?
Columns: ['Date', 'Opponent', 'Score', 'Site/Stadium', 'Loss', 'Save', 'Attendance', 'Overall Record', 'NCAAT Record']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['June 15', 'Rice', '17-5', 'Rosenblatt Stadium', 'Berry (8-5)', 'none', 18108.0, '43-29', '6-2']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Date" = 'June 15';