changing public float from another script

Hi, I am relatively new to c# and unity. I have two script

Code (CSharp):

1. public class DialogueManager : MonoBehaviour {
2.  
3.     public Animator animator;
4.  
5. public void StartDialogue(Dialogue dialogue)
6.     {
7.         animator.SetBool ("IsOpen", true);
8.         nameText.text = dialogue.name;
9.         sentences.Clear ();
10.         foreach (string sentence in dialogue.sentences)
11.         {
12.             sentences.Enqueue (sentence);
13.         }
14.         DisplayNextSentence();
15.     }
16.  
17.     void EndDialogue(){
18.         animator.SetBool ("IsOpen", false);
19.     }

and

Code (CSharp):

1. public class Note : MonoBehaviour {
2.     Rigidbody2D rb;
3.     public float speed;
4.     void Awake(){
5.         rb = GetComponent<Rigidbody2D> ();
6.     }
7.  
8.     void Start () {
9.         rb.velocity = new Vector2 (0, -speed);
10.     }

I am trying to access public float speed from Note script in DialogueManager script.
The end goal is when
animator.SetBool ("IsOpen", true);
public float speed = 0;

and when

animator.SetBool ("IsOpen", false);
public float speed will return back to its oringnal value.

 

Code (CSharp):

1. [RequireComponent(typeof(Note))]
2. public class DialogueManager : MonoBehaviour {
3.     public Animator animator;
4.     public Note noteScript;
5.     private float originalSpeed = 0f;
6.  
7. void Awake() {
8.    noteScript = GetComponent<Note>();
9. }
10. public void StartDialogue(Dialogue dialogue)
11.     {
12.       // example
13.       originalSpeed = noteScript.speed;
14.       noteScript.speed = 0f;
15. // [...]
16.  
17.    void EndDialogue(){
18.         animator.SetBool ("IsOpen", false);
19.         noteScript.speed = oiriginalSpeed;
20.     }
21.  
22.  

Alternatively you can create two methods in the Note script like this:

Code (CSharp):

1. private float speed = 0f; // replace the original
2. float originalSpeed = 0f;
3.  
4. public void SetTempSpeed(float newSpeed)
5. {
6.     originalSpeed = speed;
7.     speed = newSpeed;
8. }
9.  
10. public void RevertSpeed()
11. {
12.      speed = originalSpeed;
13. }

and then just call them from the other script:

Code (CSharp):

1. [RequireComponent(typeof(Note))]
2. public class DialogueManager : MonoBehaviour {
3.     public Animator animator;
4.     public Note noteScript;
5.  
6. void Awake() {
7.    noteScript = GetComponent<Note>();
8. }
9. public void StartDialogue(Dialogue dialogue)
10.     {
11.       // example
12.       noteScript.SetTempSpeed(0f);
13.  
14. // [...]
15.  
16.     void EndDialogue(){
17.         animator.SetBool ("IsOpen", false);
18.         noteScript.RevertSpeed();
19.     }
20.  
21.