How can I make the player stop moving when a UI dialogue box is active?

Ok so I am a beginner at c# and was wondering how to make it so that when a dialogue box appears on the screen, the player can not move at all. I am doing a 2D top-down RPG game, and I have a nice dialogue, and movement script. I would also like to mention that I made a pause menu and figured out how to stop the player from moving when the pause menu is up, but I cant do the same with this dialogue box.

Here's my dialogue script:

using System.Collections; using System.Collections.Generic; using UnityEngine; using TMPro;

public class Dialougue : MonoBehaviour { public TextMeshProUGUI textComponent; public string[] lines; public float textSpeed;

 private int index;


 // Start is called before the first frame update
 void Start()
 {
     textComponent.text = string.Empty;
     StartDialouge();
 }

 // Update is called once per frame
 void Update()
 {
     if (Input.GetMouseButtonDown(0))
     {
         if (textComponent.text == lines[index])
         {
             NextLine();
         }
         else
         {
             StopAllCoroutines();
             textComponent.text = lines[index];
         }
     }
 }

 void StartDialouge()
 {
     index = 0;
     StartCoroutine(TypeLine());
 }

 IEnumerator TypeLine()
 {

     foreach (char c in lines[index].ToCharArray())
     {
         textComponent.text += c;
         yield return new WaitForSeconds(textSpeed);
     }

 }

 void NextLine()
 {
     if (index < lines.Length - 1)
     {
         index++;
         textComponent.text = string.Empty;
         StartCoroutine(TypeLine());
     }
     else
     {
         gameObject.SetActive(false);
     }
 }

}

And here is my player movement script:

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class PlayerMovement : MonoBehaviour {

 public float moveSpeed = 5f;

 public Rigidbody2D rb;
 public Animator animator;

 Vector2 movement;

 public VectorValue startingPosition;

 void Start()
 {
     transform.position = startingPosition.initalValue;
 }


 void Update()
 {
     


     if (!PauseMenu.isPaused)
     {
         movement.x = Input.GetAxisRaw("Horizontal");
         movement.y = Input.GetAxisRaw("Vertical");

         animator.SetFloat("Horizontal", movement.x);
         animator.SetFloat("Vertical", movement.y);
         animator.SetFloat("Speed", movement.sqrMagnitude);
     }
     
 }

 void FixedUpdate()
 {
     rb.MovePosition(rb.position + movement.normalized * moveSpeed * Time.fixedDeltaTime);
 }

}

Please, any help will be appreciated. I feel like this has a simple solution that I just don't know.