WestJet – Boeing 737-700 – Turbulence – Flight Attendant Injured

C-GWJF, a Boeing 737-700 operated by WestJet was conducting flight WJA1535 from
Houston/George Bush Intercontinental (KIAH) to Calgary, AB (CYYC). While enroute in cruise, WJA1535 entered turbulence. At this time a flight attendant was at the back of a service cart near the aft galley. The flight attendant fell into the aft galley and the service cart followed and struck their hand. The flight attendant was unable to perform their duties and their duties were distributed among the other flight attendants for the remainder of the flight.