How to make dialogue system with voice

Hello I'm a beginner in unity and I'm trying to make a dialogue system, taking base from the brackeys system, however, I wanted to be able to have an audio play at the same time the text is displayed and to play the next line when you change the text, I tried to do something basically creating a system of a string that changes the name every time you change the text(it's basically the same as the normal system) and then at the end implement the audioManager.play(String); visual studios gives no errors however when I go into the game no audio is played. I will send my dialogue scripts down below (if you know about the brackeys system I have 3 scripts so I don't really know which one may be causing the problem)

DialogueManager Script:

 public class DialogueManager : MonoBehaviour
 {
     public Door1Animation doorAnimation;
 
     public Text nameText;
     public Text dialogueText;
     public Text changeText;
 
     public AudioManager Sound;
 
     public Animator textBoxAnimation;
 
     public Queue<string> sentences;
 
     public Queue<string> voiceLines;
 
     void Start()
     {
         sentences = new Queue<string>();
         voiceLines = new Queue<string>();
     }
 
     public void StartDialogue (Dialogue dialogue)
     {
         textBoxAnimation.SetBool("Open", true);
         
         changeText.text = ("Aperte R para continuar");
 
         nameText.text = dialogue.name;
 
         sentences.Clear();
 
         voiceLines.Clear();
 
 
 
         foreach (string sentence in dialogue.sentences)
         {
             sentences.Enqueue(sentence);
         }
 
         DisplayNextSentence();
 
         foreach (string voiceLine in dialogue.voiceLines)
         {
             voiceLines.Enqueue(voiceLine);
         }
 
         PlayNextLine();
 
     }
 
     public void DisplayNextSentence()
     {
         if (sentences.Count == 1)
         {
             changeText.text = ("Aperte R para fechar");
         }
 
         if (sentences.Count == 0)
         {
             EndDialogue();
             return;
         }
 
         string sentence = sentences.Dequeue();
         dialogueText.text = sentence;
     }
 
     public void PlayNextLine()
     {
         string voiceLine = voiceLines.Dequeue();
         Sound.Play(voiceLine);
     }
 
     public void EndDialogue()
     {
         Debug.Log("End of conversation");
         doorAnimation.openDoor = true;
         textBoxAnimation.SetBool("Open", false);
     }
 }

Dialogue Script:

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

 [System.Serializable]
 public class Dialogue
 {
 public string name;

 public Sprite Face;

 [TextArea(3, 10)]
 public string[] sentences;

 public string[] voiceLines;

 }

DialogueTrigger Script;

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

 public class DialogueTrigger : MonoBehaviour
 {
 public Dialogue dialogue;

 public Image faceChange;

 public void TriggerDialogue()
 {
     faceChange.sprite = dialogue.Face;

     Debug.Log("Talk");
     FindObjectOfType<DialogueManager>().StartDialogue(dialogue); 
 }

 }