user: Question: Which flight had an aircraft of Vickers Viscount Type 794?
Columns: ['Date', 'Flight', 'Aircraft', 'Registration', 'Location', 'Fatalities']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['17 February 1959', 'N/A', 'Vickers Viscount Type 793', 'TC-SEV', 'London', 14.0]
SQL:

assistant: SELECT "Flight" FROM "Table" WHERE "Aircraft" = 'Vickers Viscount Type 794';