user: Question: Which Services have a Local authority of Chiltern, and a Zone 2010 of 9?
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 "Services" FROM "Table" WHERE "Local authority" = 'Chiltern' AND "Zone 2010" = '9';