Bus timing and seat booking from Fengjie to Longtousi,chonging city

Is there anyone to help me? I want to know the timings of the bus from Fengjie,chongqing to Longtousi bus station,Chongqing city. Moreover, Whether I will get TWO seats before departure of the bus or I have to book seats in advance. I need only two seats. If to book in advance what are the procedures and the contact number.
With Thanks
Basudeb Banerjee, INDIA