Can my AI agent ask callers to take a survey at the end of a call and save the answers?

Yes.

1. Add a conversation node at the end of the flow where the agent asks whether the caller minds taking a quick survey.
2. Add an Ask and save node with your survey questions, for example "What did you think of your call?", so the answers are saved.
3. If you want the survey in a different voice, use the Forward to another agent node at that step and give the second agent the voice you want.