CSI questions

My organization is not currently using CSIs much, and we want to start! I learned at the conference that there is a report we can pull to view all CSIs within a certain time period. Can someone please tell me what report that is? And are there suggestions on how we can handle customer service issues if we do not know the person's name or they are not in Tessi? Could we create a dummy account to store all of those CSIs so they could be pulled into the report?

Thank you!