There should be two airbag warning lights, one is to tell you that the passenger seat airbag has been switched off, this can be removed by locating the passenger airbag switch at the end of the dashboard visible when passenger door is open.
The second light is on the instrument cluster and warns of a fault. If this is the light you are talking about, the obvious solution is to have the fault diagnosed and repaired. However, the most common fault is caused by a loose wiring connector under one of the front seats. These can be disconnected by objects being pushed under the seat, have a look to see if this is the problem as its easy to fix.