user: Question: What's the greek designation of the New York chapter with a charter date of April 23, 2005?
Columns: ['Greek Designation', 'Collegiate Institution', 'Charter Date', 'Status', 'City', 'U.S. State/District']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Alpha Chapter', 'SUNY Binghamton', 'February 20, 1994', 'Active', 'Vestal', 'New York']
SQL:

assistant: SELECT "Greek Designation" FROM "Table" WHERE "U.S. State/District" = 'New York' AND "Charter Date" = 'April 23, 2005';