Question: What is the name of the regional airline brand name for Delta Air Lines that utilizes both Atlantic Southeast Airlines and Endeavor Air?
Context: Delta Air Lines, Inc. ("Delta"; ) is a major American airline, with its headquarters and largest hub at Hartsfield–Jackson Atlanta International Airport in Atlanta, Georgia.  The airline along with its subsidiaries and regional affiliates operate over 5,400 flights daily and serve an extensive domestic and international network that includes 319 destinations in 54 countries on six continents, as of October 2016.  Delta is one of the four founding members of the SkyTeam airline alliance, and operates joint ventures with Air France-KLM, Alitalia, Korean Air, China Eastern Airlines, Virgin Atlantic, and Virgin Australia.  Regional service is operated under the brand name Delta Connection. Business Express Airlines (IATA: HQ) , often referred to as Business Express or BizEX, was an American regional airline founded as Atlantic Air in 1982.  In an effort to appeal to its predominantly business commuter clientele, the airline assumed the Business Express name in 1985.  In 1986 Pilgrim Airlines (Groton/New London), which itself had acquired NewAir (New Haven) about a year prior, was acquired by the airline.  This opened the valuable New York and Washington, D.C. markets.  Shortly thereafter, Business Express became one of Delta Air Lines's first Delta Connection carriers, along with Atlantic Southeast Airlines, Comair and SkyWest Airlines. Atlantic Southeast Airlines (ASA) was an American airline based in the A-Tech Center in College Park, Georgia, flying to 144 destinations as a Delta Connection carrier and, as of February 2010, commenced service as a United Express carrier.  It was a wholly owned subsidiary of SkyWest, Inc. ASA operated nearly 900 flights each day.  Its main hub was at Hartsfield-Jackson Atlanta International Airport (ATL).  ASA changed its name to ExpressJet in 2011. SkyWest Airlines is a North American airline owned by SkyWest, Inc. and headquartered in St. George, Utah, U.S..  According to the Airlines for America definitions, SkyWest is a North American major airline.  SkyWest however, operates on a regional airline level and is a member of the Regional Airline Association.  SkyWest Airlines flies to 238 cities, in 45 states; Washington, D.C., six Canadian provinces and five cities in Mexico.  The airline serves as a feeder airline, operating under contract with various major carriers.  It flies as SkyWest Airlines in a partnership with Alaska Airlines, as United Express on behalf of United Airlines, as American Eagle on behalf of American Airlines, and as Delta Connection on behalf of Delta Air Lines.  SkyWest also provides ground handling services for airports across the United States. Endeavor Air is an American regional airline that operates as Delta Connection for Delta Air Lines.  The airline was founded as Express Airlines I in 1985 and changed names to Pinnacle Airlines in 2002.  In 2012, Pinnacle's parent company filed for chapter 11 reorganization, then emerged as a wholly owned subsidiary of Delta Air Lines.  The name of the airline was changed to Endeavor Air on August 1, 2013. Delta TechOps is the maintenance, repair and overhaul (MRO) division of Delta Air Lines, and is headquartered at Hartsfield-Jackson International Airport (ATL) in Atlanta, Georgia.  With more than 9,600 Technical Operations employees and 51 maintenance stations worldwide, Delta TechOps is a full-service maintenance provider for the more than 750 aircraft that make up the Delta Air Lines fleet.  In addition to maintaining the Delta Air Lines fleet, Delta TechOps also provides MRO solutions and support to more than 150 third-party operators around the world, making it the largest airline MRO provider in North America and the third largest worldwide. United Airlines, Inc., commonly referred to as United, is a major U.S. airline headquartered in Chicago, Illinois.  It is the world's third-largest airline when measured by revenue, after American Airlines and Delta Air Lines.  United operates a large domestic and international route network, with an extensive presence in the Asia-Pacific region.  United is a founding member of Star Alliance, the world's largest airline alliance.  Regional service is operated by independent carriers under the brand name United Express.  Its main competitors are American Airlines, Delta Air Lines, and Southwest Airlines. Delta Connection is a regional airline brand name for Delta Air Lines, under which a number of individually owned regional airlines operate short- and medium-haul routes.  Delta's lone wholly owned regional airline, Endeavor Air, also resides under the Delta Connection banner.  Mainline carriers often use regional airlines to operate services in order to increase frequency, serve routes that would not sustain larger aircraft, or for other competitive reasons. Freedom Airlines, Inc. was an American FAA Part 121 certificated air carrier operating under air carrier certificate number FDKA087K issued on April 1, 2002.  The Nevada Corporation was headquartered in Irving, Texas and a subsidiary of Mesa Air Group.  It operated flights as Delta Connection for Delta Air Lines serving Delta's hub at Cincinnati/Northern Kentucky International Airport in Hebron, KY, near Cincinnati, OH using EMB 145 aircraft.  Freedom's base moved to Cincinnati from New York City in July 2009.  Freedom previously operated the CRJ-900 aircraft for Delta Connection as well, however, this contract was canceled and all aircraft were transferred to Eagan, MN-based Mesaba Airlines, Atlanta, GA-based Atlantic Southeast Airlines, and Pinnacle Airlines. Pinnacle Airlines Corporation was an American holding company headquartered in Memphis, Tennessee, and was the parent company of Pinnacle Airlines and Colgan Air until Colgan was closed down in 2012.  The company contracted its airlines to fly in the aircraft livery of other airlines such as Delta Air Lines and United Airlines.  The company filed for bankruptcy protection under Chapter 11 in 2012 and emerged from Chapter 11 in 2013 as a wholly owned subsidiary of Delta Air Lines.  The company's only surviving airline, Pinnacle, became Endeavor Air.
Answer: Delta Connection