P,
Swapping any two of the incoming phases will certainly reverse the direction of rotation however as advised by others here you need to firstly ensure the motor and load are designed for both forward & reverse rotation. The nature of the cooling fan in some motors is such that it only provides adequate cooling when operated in a specific direction, normally signalled by an 'arrow' on the fan cowling.
More importantly however is the load. Some driven machines, for example pumps, fans and compressors can be damaged beyond repair if they are driven in the wrong diection. Take note before making any changes.
Regards,
GGOSS