user: Question: what is the class when the chassis is DAllara F308, rounds is All and the driver is Sam Abay?
Columns: ['Team', 'Driver', 'Class', 'Chassis', 'Engine', 'Rounds']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Hitech Racing', 'Max Chilton', 'C', 'Dallara F308', 'Mercedes HWA', 'All']
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Chassis" = 'Dallara F308' AND "Rounds" = 'All' AND "Driver" = 'Sam Abay';