We are not moving forward with your application. However, you have great potential to develop in this area. You can look into this more before your following interview. While a candidate might not get selected for a particular role, they can undoubtedly derive some learnings from experience. If you help them exemplify the benefits they can gather from an unsuccessful interview, they will appreciate your team and management. Hence, in some cases, you can point out specific tips they can use to ace their next interview. Similarly, you can lead them towards helpful resources concerning their field. ( I didn't go to the interview yet!!!)