It 'teaches' them how to talk to and greet passengers, estimate their body language in the rear-view mirror, 'conflict management' and how to 'risk assess' before lifting baggage.

The technology on board will include facial recognition, so that bar staff can greet passengers by name and in their language and prepare their drinks before they order.

This meant that attendants could greet passengers on arrival, and it helped to keep out intruders.