Mei saw an advertisement by Amazing Tours in the newspaper: 'Fabulous deal: Bali from RM 999 for 2. Call xxxxxxx to make reservation now'. When Mei called, she was told that the tour packages were all sold out. Mei insisted that Amazing Tours honour their promise. In the light of the above scenario distinguish between a true offer and an invitation to treat in the light of Contract Act 1950 by citing relevant case laws or examples.