Unity Dialogue System only active when NPC is in range?

Hi, I've followed a tutorial and created a script for an NPC Dialogue. Everyt$$anonymous$$ng works. But the dialogue always starts when I start the game, even when no NPC is in range. How can I fix my script, so the dialogue only begins when I interact/collide with an NPC?

Hi, I've followed a tutorial and created a script for an NPC Dialogue. Everyt$$anonymous$$ng works. But the dialogue always starts when I start the game, even when no NPC is in range. How can I fix my script, so the dialogue only begins when I interact/collide with an NPC?

using System.Collections; using System.Collections.Generic; using TMPro; using Unity.VisualScripting; using UnityEngine; using UnityEngine.UI;

public class NPCInteraction : MonoBehaviour { public TextMeshProUGUI textDisplay; public string[] sentences; private int index; public float typingSpeed; public GameObject contButton;

 void Update()
 {
     if (textDisplay.text == sentences[index])
     {
         contButton.SetActive(true);
     }
 }

 void Start()
 {
     StartCoroutine(Type());


 }

 IEnumerator Type()
 {
     foreach (char letter in sentences[index].ToCharArray())
     {
         textDisplay.text += letter;
         yield return new WaitForSeconds(typingSpeed);
     }
 }

 public void nextSentence()
 {
     contButton.SetActive(false);

     if (index < sentences.Length)
     {
         index++;
         textDisplay.text = "";
         StartCoroutine(Type());
     }
     else
     {
         textDisplay.text = "";
         contButton.SetActive(false);
     }


 }

}