Can I book 4 soft sleeper seats for 2 people?

Hello, I want to take this train:
My TrainTrain No.: Cancel this train K382/K383 Wuhan [hankou] to Nantong
Dep. Date&time: Jan 09, 2013, 19:46
Arr. Date&time: Jan 10, 2013, 08:40+1
Ticket Class: Soft Sleeper
Ticket Price: CNY411(US$68) per person Service&Delivery fee: CNY150(US$25) per ticket


Passenger No.:123456789101112131415 16 or more Total price: CNY2244(US$368)

Can I book 4 beds for only 2 people so we can have a private car? Happy to pay for 4.

Thank you,
David