How do I stop my player movement?,How do I stop the player movement for a while?

Hi I'm using unity for the first time and have no clue about c# etc. I would like to prevent my player from moving while a dialogue box is showing. I'm using the RPGTalk asset which allows me to call a function from a script while the text ist showing. I don't really know what to put after "else" and I would be very grateful if someone could help me.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerController : MonoBehaviour
 {
 
     public float speed;
     public bool controls;
 
     private Rigidbody2D rb;
     private Vector2 moveVelocity;
     private Animator anim;
 
     void Start()
     {
 
         rb = GetComponent<Rigidbody2D>();
         anim = GetComponent<Animator>();
 
 
 
     }
 
     void Update()
     {
         if (controls)
         {
 
             Vector2 moveInput = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));
             moveVelocity = moveInput.normalized * speed;
         }
     } else {
         
 
     public void CancelControls()
     {
         controls = false;
     }
 
     public void GiveBackControls()
     {
         controls = true;
     }
 
 
 
     void FixedUpdate()
         {
             rb.MovePosition(rb.position + moveVelocity * Time.fixedDeltaTime);
 
         }
     }
 

,I'm working with Unity for the first time and I'm a total noob in C#. I wanted to prevent the player from moving while the textbox is showing. I'm using the RPGTalk asset which allows me to call a function from a script when the talk begins and ends. Does anyone have an idea how to stop the player movement after "else"?

using System.Collections; using System.Collections.Generic; using UnityEngine; public class PlayerController : MonoBehaviour { public float speed; public bool controls; private Rigidbody2D rb; private Vector2 moveVelocity; private Animator anim; void Start() { rb = GetComponent<Rigidbody2D>(); anim = GetComponent<Animator>(); } void Update() { if (controls) { Vector2 moveInput = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical")); moveVelocity = moveInput.normalized * speed; } } else { public void CancelControls() { controls = false; } public void GiveBackControls() { controls = true; } void FixedUpdate() { rb.MovePosition(rb.position + moveVelocity * Time.fixedDeltaTime); } }