Hi,
There is no available booking feature in HikaShop for the moment ; that feature would be provided by "HikaBooking", which will be an add-on for HikaShop.
That component does not exist for the moment and his development hasn't started (due to some big developments in HikaShop/HikaMarket), but it is a project that we have.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.