My Textbox

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class ItemDialouge : MonoBehaviour
{
    public GameObject TextBox;

    public Text Dialouge;

    public string[] ChatArray;

    private int index;

    private bool MyBool;

    private PlayerMovement Simon;



    private void OnTriggerEnter2D(Collider2D collision)
    {
        MyBool = true;
        Simon = collision.gameObject.GetComponent<PlayerMovement>();
        index = 0;
        Dialouge.text = ChatArray[index];
    }

    private void OnTriggerExit2D(Collider2D collision)
    {
        MyBool = false;
        index = 0;
    }

    void Start()
    {
        TextBox.SetActive(false);
    }

  public void Update()
    {
        Dialouge.text = ChatArray[index];
        if(MyBool == true)
        {
            if (Input.GetKeyDown("e"))
            {
                Time.timeScale = 0;
                TextBox.SetActive(true);
                Simon.moveSpeed = 0;
                index = 0;
                Dialouge.text = ChatArray[index];
            }
            if (Input.GetKeyDown(KeyCode.Mouse0) || Input.GetKeyDown(KeyCode.Space))
            {
                index ++;
                Dialouge.text = ChatArray[index];
            }
            if (index >= ChatArray.Length)
            {
                Simon.moveSpeed = 5;
                index = 0;
                TextBox.SetActive(false);
            }
        }

    }
}