DROP TABLE IF EXISTS `civicrm_sms_conversation_contact`;
DROP TABLE IF EXISTS `civicrm_sms_conversation_action`;
DROP TABLE IF EXISTS `civicrm_sms_conversation_question`;
DROP TABLE IF EXISTS `civicrm_sms_conversation`;

DROP TABLE IF EXISTS `civicrm_sms_conversation`;
DROP TABLE IF EXISTS `civicrm_sms_conversation_question`;
DROP TABLE IF EXISTS `civicrm_sms_conversation_contact`;
DROP TABLE IF EXISTS `civicrm_sms_conversation_action`;

Fix order of table delete for uninstall
Fix order of table delete for uninstall
