Good afternoon Tuan,
About 1 month ago I upgraded from Joomla 2.5.1 to 3.5.1. I don't remember any URL changes but I recently upgraded to Joomla 3.6 ( day it was released ) and had many problems as per other users. The URL on all events now contains 'component/eventbooking/'.
That kind of URL indicate that you haven't had any menu item to link to Events Booking. Could you please check? Try to create a menu item to link to a menu options (for example, upcoming events) and it should solve that issue