Babysitter - Full-time / Part-time

Looking for a part time, recurring babysitter/nanny for appointments, date nights and days when kids are off school and we have to work. We are looking for CPR certification and we have a smoke-free household. At times making light meals of snacks may be necessary but this would not be a frequent expectation. We have two girls ages 5&4 who love crafts, playing outside and dancing. We are looking for someone with flexibility in their schedule to allow for need on short notice, for example snow days or possible sick days