old_contents: sabre_endpoints = {
      'instaflights': '/v1/shop/flights',
      'flights_to': '/v1/shop/flights/cheapest/fares'
  }
  
new_contents: sabre_endpoints = {
      'instaflights': '/v1/shop/flights',
      'flights_to': '/v1/shop/flights/cheapest/fares',
      'seat_map': '/v3.0.0/book/flights/seatmaps'
  }
  
subject: Add seat map endpoint