INSERT INTO messages_tbl
            (message_id,
             chat_channel,
             user_type,
             message_type,
             message_custom_type,
             msg_created_on)
VALUES      ('00001',
             'chat_1',
             'consumer',
             'msg',
             'example message',
             '2018-09-27 10:14:42');

INSERT INTO messages_tbl
            (message_id,
             chat_channel,
             user_type,
             message_type,
             message_custom_type,
             msg_created_on)
VALUES      ('00002',
             'chat_1',
             'merchant',
             'msg',
             'example message',
             '2018-09-27 11:14:42');