MSP-RSW in F yesterday, 3 1/2h flight, no PDB, first (and only) drink service with dinner 1 1/2h in, never saw the FA again for the rest of the flight. No snacks offered, had to ring the call light for a beverage 2 1/2h into the flight and a main cabin FA came to respond. Hope this is not becoming the norm. Yesterday was not a particularly good day for cabin service: the prior flight DEN-MSP in C+ had some initial light turbulence with FAs seated. Seatbelt sign turned off a full hour before landing, but FA crew decided not to do any main cabin service (no snacks in C+ either).