user: Question: On what flight day was U2 played?
Columns: ['Flight Day', 'Song', 'Artist', 'Played for', 'Links']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Day 2', '" Beautiful Day "', 'U2', 'Mark Kelly', 'WAV, MP3, OGG']
SQL:

assistant: SELECT "Flight Day" FROM "Table" WHERE "Artist" = 'U2';