Help with godot engine script calling functions

I have a problem with godot engine , I'm doing a rpg and now I'm doing the dialog system, and for that I do a scene that has a sprite for the style of the box, a RichTextLabel , and a Timer , in script I have this:

extends Node2D
var vc = 0
var text = false
onready var t = Timer.new()
func _ready():
    var t = Timer.new()
    t.set_wait_time(1)
    t.set_one_shot(true)
    self.add_child(t)
    t.start()
    yield(t, "timeout")
func _on_Timer_timeout():
    get_node("spr_cuadro").show()
    while get_node("spr_cuadro/rtl_mensaje").get_visible_characters() <= get_node("spr_cuadro/rtl_mensaje").get_text().length():
        get_node("Cuadro/Mensaje").set_visible_characters(vc)
        vc += 1
        yield(t, "timeout")
    text = true
func message():
    print("hello")
    get_node("spr_cuadro/rtl_mensaje").set_bbcode("ef")
    if Input.is_action_pressed("ui_k"):
        if text == false:
            get_node("Timer").start()
    elif Input.is_action_pressed("ui_k"):
        if text:
            get_node("spr_cuadro/rtl_mensaje").set_visible_characters(0)
            vc = 0
            get_node("spr_cuadro").hide()
            yield(t, "timeout")
            text = false

I also have another scene called "enemie" which has instantiated dialog Here is the code of "enemie":

extends KinematicBody2D
const diascr = preload("res:///scripts/dialog.gd")
onready var dialog = get_node("dialog").get_script()
func _ready():
    set_process(true)
func _process(delta):
    move(Vector2(1,0))
    dialog.message("messaje")

What I want to do is link the dialog script with the enemie script and call the message function to show the message on the screen, if someone could help me I would be very grateful

The error: Invalid call to function 'message' in base 'GDScript'. Expected 0 arguments. in enemie line 8