Identify who assigned a user a CTA

Our group leader and managers will assign CTAs to specific people. However, right now nothing in the CTA says who assigned it. Our leaders would like the end user to know they were just assigned a CTA by them and it was not an automated CTA. Another use case, we have started using CTAs for me as the admin as a way for me to track customers to add or errors received. However, I cannot reply back to say fixed or added because I don't know who sent me the CTA.