Where is the reset button for the lights that.

Where is the reset button for the lights that come up, I have two on, one is for the tire, and another is for the airbag, my son moved the seat and adjusted it, (passenger seat) and it has been on ever since. The garage checked the tires and let air out of them the last guy put too much in, "for winter" and now they are normal, but the light won't go off and the mechanic couldn't find the reset button.