Caring and experienced babysitter needed

I will need occasional care services for my 6 year old son and my 5 month old baby girl. Most likely at nights for date nights with hubby or social events. I will always try to leave my 6 year old fed and my 5 month old baby fed, changed and asleep so all you have to do is be there in case of any emergency or if baby wakes up. Nothing else. ? I will only need the sitter to watch over my 6 year old and if needed for my 5 month old baby, change diapers, bottle feed, and burp baby. So definitely my ideal sitter must have experience with newborns/babies. No cleaning or cooking needed to be done for me. The sitter will have to come to my home only for the hours agreed.