Stop enemy from chasing at a certain point

Hi, I have an enemy ai script. Now I want add, that the enemy stops at a certain point what do i have to add?`using System.Collections; using System.Collections.Generic; using UnityEngine;

public class enemyController : MonoBehaviour {

 public Transform player;
 public float playerDistance;
 public float awareAI = 10f;
 public float AIMoveSpeed;
 public float damping = 6.0f;
   
 public Transform[] navPoint;
 public UnityEngine.AI.NavMeshAgent agent;
 public int destPoint = 0;
 public Transform goal;
 public static float enemyHealth;
   
 void Start () {
     UnityEngine.AI.NavMeshAgent agent = GetComponent<UnityEngine.AI.NavMeshAgent>();
     agent.destination = goal.position;
 
     agent.autoBraking = true;
    
 }
   
 void Update () {
    
     playerDistance = Vector3.Distance (player.position, transform.position);

             if (playerDistance < awareAI)
     {
         LookAtPlayer();
     
     }
 
    
     if (playerDistance < awareAI)
     {
         if (playerDistance < 10f)
         {
         agent.SetDestination(player.transform.position);
         }
             else
         GotoNextPoint();      
     }

    if (playerDistance > 5f)
    {
        
    }
    
    
     if (agent.remainingDistance < 0.5f)
             GotoNextPoint();  
    
 }
   
 void LookAtPlayer()
 {
     transform.LookAt(player);  
 }
 
   
 void GotoNextPoint()
     {
         if (navPoint.Length == 0)
             return;      
         agent.destination = navPoint[destPoint].position;
         destPoint = (destPoint + 1) % navPoint.Length;
     }
   
    
     void Chase ()
     {
         transform.Translate (Vector3.forward * AIMoveSpeed * Time.deltaTime);
     }
 
 
 }

`