I flew ORF-IAH-MSY-IAH-ORF. I got PDBs for both IAH-MSY and IAH-ORF on mainlines. FA handed out the snack bag on MSY-IAH with a small bottle of water before departure, which should not be counted as PDB. There was zero service on air afterwards. Turbulence was the excuse for > 1 hr on air. ORF-IAH was on UX, operated by Mesa. Only snack box was served for this > 3 hr flight.