Question: In which country is the headquarters of the airline that Sempati Air had its IATA Code reassigned to?

Context paragraphs:
Brussels Airlines: Brussels Airlines (stylized as brussels airlines) is the flag carrier and largest airline of Belgium, based and headquartered at Brussels Airport.  It operates to over 90 destinations in Europe, North America, Africa and Asia and also offers additional charter services, maintenance and crew training.  The airline is a member of the Star Alliance as well as the International Air Transport Association.  The airline's IATA code "SN" is inherited from its predecessors, Sabena and SN Brussels Airlines.  Lufthansa purchased 45% of the company in 2009, and on September 29, 2016, Lufthansa announced it would purchase the remainder of Brussels Airlines for €2.6 million euros.  The transaction was completed in early January 2017.

SpiceJet: SpiceJet is a low-cost airline headquartered in Gurugram, India.  It is the third largest airline in the country by number of domestic passengers carried, with a market share of 14.2% as of July 2017.  The airline operates 312 daily flights to 55 destinations, including 45 Indian and 10 international destinations from its hubs at Delhi, Kolkata and Hyderabad.

Scoot: Scoot Tigerair Pte Ltd. (operating as Scoot) is a Singaporean low-cost long-haul airline owned by Singapore Airlines through its subsidiary Budget Aviation Holdings.  It launched flights in June 2012 on medium and long-haul routes from Singapore, predominantly to China and India.  Initially, Scoot's fleet consisted of Boeing 777 aircraft obtained from Singapore Airlines.  The airline began to transition its fleet to Boeing 787 Dreamliner aircraft from 2015.  On 25 July 2017, Tigerair was officially merged into Scoot using Tigerair's air operator's certificate (AOC) but retaining the 'Scoot' brand.  With the change of AOC, the airline's IATA code was changed from TZ to TR, previously used by Tigerair.  Its head office is at Singapore Changi Airport.

Sempati Air Flight 304: Sempati Air Flight 304 (SSR304) was a scheduled domestic passenger flight, flying from Husein Sastranegara International Airport in Bandung, West Java to Halim Perdanakusuma Airport in Jakarta.  On 17 July 1997, the aircraft operating the flight, a Fokker F27 Friendship 600 leased from Trigana Air Service, registered PK-YPM, crashed into a densely populated neighbourhood of Margahayu in Bandung after suffering an engine failure shortly after take-off killing 28 of the occupants and injuring several on the ground.

Trump Shuttle: Trump Shuttle, Inc. was an airline owned by Donald Trump from 1989 to 1992.  The landing rights and some of the physical assets necessary to operate the shuttle flights were originally part of Eastern Air Lines and known as the Eastern Air Lines Shuttle.  It operated hourly flights on Boeing 727 aircraft from LaGuardia Airport in New York City to Logan International Airport in Boston, Massachusetts and Ronald Reagan Washington National Airport in Washington, D.C., then known as Washington National Airport, as well as charter service to other destinations.  Its IATA designator code was TB (later reassigned to Jetairfly).

Selaparang Airport: Selaparang Airport (IATA: AMI, ICAO: WADA) , was the sole airport serving the island of Lombok and the city of Mataram, the capital of the province of West Nusa Tenggara, Indonesia until its closure on 30 September 2011.  The IATA code "AMI" came from the nearby port of Ampenan, now a part of Mataram.  The airport was operated by PT.  Angkasa Pura 1 (PERSERO).  The new Lombok International Airport operated under the AMI IATA code until late November 2011, toward the end of the month the IATA code LOP was formally listed for the new airport and was slowly being transitioned by the airlines operating to Lombok.

Francisco Sarabia National Airport: Francisco Sarabia National Airport or Terán Airport (formerly IATA code TGZ, ICAO code MMTG) was a national airport located at Tuxtla Gutiérrez, Chiapas, Mexico.  It was used to handle national air traffic for the city of Tuxtla Gutiérrez.  As of right now it is closed to civil operations and it is used as Base Aérea Militar No. 6 by the Mexican Air Force.  Scheduled airline service for the city is now handled at the new Angel Albino Corzo International Airport, which has taken over Sarabia's former IATA and ICAO airport codes (as of June 2006).  It is now used for military purposes only.

Hooters Air: Hooters Air was an airline headquartered in Myrtle Beach, South Carolina, USA.  Hooters Air flights were operated by Winston-Salem, North Carolina-based Pace Airlines both as ad hoc private charters, and as scheduled USDOT public charters.  As such, flights operated both under Pace Airlines' IATA Code of Y5 for ad hoc charters, and under its own IATA Code of H1 for public charters.

Sempati Air: Sempati Air was an airline based in Indonesia.  Partially owned by friends and family of President Suharto of Indonesia, the airline folded due to bankruptcy after his May 1998 resignation.  Its IATA Code has since been reassigned to SpiceJet.

List of IATA-indexed railway stations: This is a list of IATA-indexed railway stations, which are assigned codes by the IATA, similar to IATA airport codes.  Such railway stations are typically used in air-rail alliances or code sharing agreements (commonly known as "Rail Fly") between airlines and rail lines, particularly in Europe.  By assigning railway stations an IATA code, passengers on trips involving those stations can be ticketed all the way.  Sometimes they can get checked straight through to their final destination, without the bother of having to claim their baggage and check-in again when changing between the rail and air portions of a trip.  At other places passengers have to carry their baggage on the train, but anyway need no separate train booking process.

Supporting paragraphs: Sempati Air SpiceJet
Answer: India