user: Question: Which Zone 2008 has Services of Greater Anglia, and a Station of Cheshunt?
Columns: ['Station', 'Services', 'Local authority', 'Zone 2007', 'Zone 2008', 'Zone 2010', 'Zone 2013']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Amersham', 'Metropolitan line and Chiltern Railways', 'Chiltern', 'D', '9', '9', '9']
SQL:

assistant: SELECT "Zone 2008" FROM "Table" WHERE "Services" = 'Greater Anglia' AND "Station" = 'Cheshunt';