Following an intervention by Finance Minister Grant Robertson, Air NZ has added more flights and dropped fares to and from Christchurch in New Zealand. Last night, the national carrier had flights between Auckland and Christchurch priced as high as $800 for a return trip.Robertson is the shareholding Minister for the Crown which owns 52 percent of the airline. He made contact with the airline.Robertson said on Twitter the airline had the option of offering compassionate fares at certain times and he believed this should be one of them. It was the airline’s call and “it was the right one”. Flights have now dropped to an average $150 dollars one way, and Air NZ is providing free trips for immediate family members of those killed as well as discounts for wider family.