What was the serve time for the complaint call from client "C00007127" on 2017/2/22?
serve time refers to ser_time; longer ser_time means more verbose or longer complaint; on 2017/2/22 refers to "Date received" = '2017-02-22';
SELECT T1.ser_time FROM callcenterlogs AS T1 INNER JOIN events AS T2 ON T1.`Complaint ID` = T2.`Complaint ID` WHERE T2.Client_ID = 'C00007127' AND T1.`Date received` = '2017-02-22'