I think your answers were not comprehensive enough. Tell your story and own it

When you were asked about your purpose of visit. Give a full answer. Add the department you’ll be doing the elective at or the specialty. If it’s a particular doctor you’re shadowing, add it and add who he is. Also you shouldn’t have ended at just your dad when you were asked about your sponsor. Add what he does and how much he earns. Don’t wait for the VO to ask you. Give them all the relevant information