user: Question: On what date was the opponent the Miami Dolphins?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 6, 1998', 'at Chicago Bears', 'W 24–23', '55,614']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponent" = 'Miami Dolphins';