user: Question: On what dates were episodes written by Robert Carlock aired?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real']
Sample row: [219.0, 1.0, '"The One After Joey and Rachel Kiss"', 'Kevin S. Bright', 'Andrew Reich & Ted Cohen', 'September25,2003', 176251.0]
SQL:

assistant: SELECT "Original air date" FROM "Table" WHERE "Written by" = 'Robert Carlock';