user: Question: What is the ICAO when the IATA is IST?
Columns: ['City', 'Country', 'IATA', 'ICAO', 'Airport']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Adana', 'Turkey', 'ADA', 'LTAF', 'Adana Şakirpaşa Airport']
SQL:

assistant: SELECT "ICAO" FROM "Table" WHERE "IATA" = 'IST';