user: Question: What is the Outcome of the match with a Score of 6–3, 6–4?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Opponent in the final', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', '27 July 2003', 'Puerto Ordaz', 'Hard', 'Zuzana Cerna', '0–6, 0–6']
SQL:

assistant: SELECT "Outcome" FROM "Table" WHERE "Score" = '6–3, 6–4';