user: Question: Which Flag did the Ship AIDAvita have?
Columns: ['Ship', 'Built', 'Builder', 'Entered Service for AIDA', 'Gross Tonnage', 'Flag']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['AIDAcara', 1996.0, 'Aker MTW', '1996–Present', '38,531 tons', 'Italy']
SQL:

assistant: SELECT "Flag" FROM "Table" WHERE "Ship" = 'AIDAvita';