Question: What city is the head office of József Váradi's airline located in?
Context: Diamanten ("The Diamond") or Oksenøyveien 3 is an office building located at Fornebu in Bærum, Norway.  It was built in 1985 as the head office of the airline Braathens SAFE, and later became the head office of SAS Braathens.  As of April 1, 2010, it has been the head office of Norwegian Air Shuttle. Viking Airlines AB was a privately owned charter airline with a head office in Stockholm, Sweden and based in Stockholm.  Viking Airlines primarily operated charter flights for European tour operators.  The airline was established in 2003.  Viking Airlines had its head office in Spånga, Stockholm, Sweden. József Janos Váradi (born 21 September 1965) is a Hungarian businessman who co-founded Wizz Air and has been its CEO since 2003. Future Fibre Technologies (FFT) is a fiber optic sensing technologies company based in Melbourne, Australia, with its US head office in Mountain View, California, Middle East head office in Dubai, Indian head office in New Delhi and European head office in London.  Founded in 1994, Future Fibre Technologies product line provides optical fiber intrusion detection systems for perimeters, buried oil and gas pipelines and data communication networks. Kingfisher Airlines was established in 2003.  It is owned by the Bengaluru based United Breweries Group.  The airline started commercial operations on 9 May 2005 with a fleet of four new Airbus A320-200s operating a flight from Mumbai to Delhi.  It started its international operations on 3 September 2008 by connecting Bengaluru with London.  Kingfisher's head office is located in Kingfisher House Western Express Highway Vile Parle (E) Mumbai – 400099 India and its registered office is located in UB City, Bangalore.  Its head office was previously in the Kingfisher House in Vile Parle (East), Mumbai.  In 2012 Vijay Mallya was trying to sell the Vile Parle Kingfisher House.  The airline had shut down its operations when on 20 October 2012 the DGCA suspended its flying license.  This suspension had been due to failure to give an effective response to the show-cause notice issued by DGCA.  However, The airline had locked out its employees for several days before this suspension.  On 25 October 2012, the employees agreed to return to work.  On 7 June 2010 Kingfisher became a member elect of the Oneworld airline alliance when it signed a formal membership agreement.  Kingfisher confirmed on 20 December 2011 that it will join the Oneworld airline alliance on 10 February 2012.  Kingfisher would have been the first Indian carrier to join one of the big airline alliances.  However, on 3 February 2012, owing to bad financial situation and two days after the International Air Transport Association (IATA) clearing house suspended Kingfisher Airlines; the airlines participation to Oneworld has been put on hold. MN Aviation, Inc., doing business as MN Aviation Services, is a Puerto Rican Air Charter airline located at the Luis Muñoz Marín International Airport in San Juan.  The airline was founded in 1993. Air Alps (Air Alps Aviation, Alpenländisches Flugunternehmen Ges.m.b.H.)  was an airline with its head office at Innsbruck Airport in Innsbruck, Austria.  It was an independent regional airline serving 10 cities in Italy from Milan and Bolzano, international services from Milan, as well as charter services.  Its main base was Innsbruck Airport, with hub at Malpensa Airport, Milan.  Formerly its head office was elsewhere in Innsbruck. Skyways Express AB was a Swedish airline that operated regional and domestic scheduled services.  With its corporate head office on the property of Stockholm-Arlanda Airport in Sigtuna Municipality, Sweden, its main hub was at Stockholm-Arlanda Airport.  The airline was placed into administration on 22 May 2012.  Previously its head office was at Eurostop köpcenter, Cederströms slinga, Arlandastad. Sepehran Airlines (Persian: هواپیمایی سپهران‎ ‎ ) is an airline located in Shiraz city of Iran. Wizz Air, legally incorporated as "Wizz Air Hungary Ltd." (Hungarian: "Wizz Air Hungary Légiközlekedési Kft. " ), is a Hungarian low-cost airline with its head office in Budapest.  The airline serves many cities across Europe, Israel and the United Arab Emirates.  It has the largest fleet of any Hungarian airline, although it is not a flag carrier, and currently serves 42 countries.  Its Jersey based parent company, Wizz Air Holdings Plc, is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.
Answer: Budapest