Celebrating its 71^st anniversary on September 28, 2016, PT Kereta Api Indonesia (Persero) held KAI Anniversary Promo. This promotion is for the provision of cheap rates for Rp 28,945.00 for long-distance trains and medium commercial. There are cheap fares on some seats for trains to various destinations. These promo tariffs imposed on ticket bookings starting on September 24 to 29, 2016 for a departure on the 27^th until the 29^th of September, 2016. Promo ticket reservations can only be made through the contact center 121, KAI Access application, and tiket.keretaapi.co.id. Promo tickets cannot be booked through the counter station, agents, external channels, and also vending machines. If these promo tickets canceled, they cannot be refunded. 

8. What is the writer's intention to write the text?