Babysitter needed for the evening to help get the littles down for bed

Primarily I am looking for someone who can be here in case of emergency. The sitter will help get my 5 year old daughter and 3 year old son with their bedtime routine but otherwise the main responsibility would be just to be present and to respond appropriately in case of emergency.

We are in Alexandria. I am looking for care on 1/18 from 7 PM-10 PM and some other evenings or weekends in the future as well.