user: Question: What was the date of the game with 16,404 people?
Columns: ['Date', 'Opponent', 'Result', 'Game Site', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['April 8, 2007', 'Los Angeles Galaxy', 'T, 0-0', 'Robertson Stadium', '16,404']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Attendance" = '16,404';