Question: What airline has hubs in both Noi Bai International Airport and Tan Son Nhat International Airport?
Sentence (from "Noi Bai International Airport"): Nội Bài International Airport (IATA: HAN, ICAO: VVNB) (Vietnamese: "Sân bay Quốc tế Nội Bài" ) in Hanoi, the capital of Vietnam, is the largest airport in Vietnam in terms of total capacity.
Relevant evidence: No