Those are great questions, Mary! At Life.Church, we try our best to follow up in 24-48 hours. We've ran into the same issue you described: one person being interested in multiple ministries/events. We try to centralize our initial contact: one person, staff or volunteer, reaches out and gets the attender started on his/her next step. Then, he/she is getting connected with the church through one person initially and then can connect with ministry leaders once their first steps are taken care of.
I hope this helps! Have a great day.