store procedure execute con date

[agenti]

DELIMITER $$

DROP PROCEDURE IF EXISTS `progetto`.`lista` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `lista`(data1 Date, data2 Date)
BEGIN


SET @qry =  'SELECT tbl.nome,tbl.ID,prezzi(ID,'data1','data2') from tbl';

  PREPARE s1 FROM @qry;
  EXECUTE s1;
 DEALLOCATE PREPARE s1;

END $$

DELIMITER ;

l'errore è

Script line: 4 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'data1','data2') from rooms';

PREPARE s1 FROM @qry;
EXECUTE s1;
DEALLOC' at line 5


come inserisco un parametro nella stringa ?