sentences:  BCal inaugurated the daily scheduled passenger flights with a Boeing 707-320C narrow-bodied aircraft.In April 1978, BCal re-configured the 707s plying this route in a three-class layout, which featured a dedicated "Executive" cabin, in addition to a first and an economy class section.This was the first time since the beginning of the jet age that a scheduled airline had offered a "third" class specifically aimed at the business traveller.