Write SQL query to solve given problem: List down all of the sales IDs for sales handled by sales people with first name starting with alphabet "s".. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.SalesID FROM Sales AS T1 INNER JOIN Employees AS T2 ON T1.SalesPersonID = T2.EmployeeID WHERE SUBSTR(T2.FirstName, 1, 1) = 's'