NEW DELHI: The Supreme Court on Monday sought the Centre’s response on a PIL accusing airlines of not refunding money to passengers who had booked tickets for flights which were later cancelled due to the nationwide lockdown.A bench, comprising Justices N V Ramana , S K Kaul and B R Gavai, said it would be arbitrary on the part of airlines if the allegation is true and asked the Centre to respond to the petition.The PIL alleged that airlines are violating government orders to pay full refund for tickets booked for air travel on dates falling during the lockdown.It said the airlines have created a credit shell valid for one year, which is not permissible under the direction issued by the government asking airlines to refund the amount within three weeks.