Camera controller help

Hey all, I have to do a games assignment where you play as a robot. I am trying to have it so the camera follows the robot as it moves around and the camera is positioned behind the robot. While I have the camera done, I have the problem where the camera is just on constant rotate around the model. It doesn't stop and just keeps moving quickly around the model in a circular motion. I feel this can easily be changed but I don't know how. Anyone have an idea how to fix this? Here is my code for the camera:

 using UnityEngine;
 using System.Collections;
 
 public class FollowCamera : MonoBehaviour
 {
     public GameObject target;
     public float damping = 3;
     Vector3 offset;
 
     void Start()
     {
         offset = target.transform.position - transform.position;
     }
 
     void LateUpdate()
     {
         float currentAngle = transform.eulerAngles.y;
         float desiredAngle = target.transform.eulerAngles.y;
         float angle = Mathf.LerpAngle(currentAngle, desiredAngle, Time.deltaTime * damping);
 
         Quaternion rotation = Quaternion.Euler(0, angle, 0);
         transform.position = target.transform.position - (rotation * offset);
 
         transform.LookAt(target.transform);
     }
 }
 

Thanks and sorry if I am not fully explaining it.