According to Canon Law (the law of the Church), the pastor of a parish has the right and obligation to celebrate the Sacraments with those under his care. Another priest would be able to celebrate the Sacraments with the permission of the pastor. To schedule all Sacraments celebrated in the parish, you need to first contact Father David before contacting any other priest to celebrate a Sacrament. At his discretion, the pastor can delegate another priest to celebrate the Sacrament. Thanks for your consideration and cooperation!