Parent's what would you do if your child did this?

If she doesn't have sense enough to know what a real, true emergency is, then she doesn't have sense enough to have a phone. The phone would go and she would be made to volunteer at a local organization (fire dept., police dept.) washing their cars and trucks or just picking up trash to make up for calling them out for no good reason and wasting their time and tax money. I would also make her write a letter of apology to the teacher, 911 operator and the police department.