Problem with if-else conditions in Python selenium

Hey guys I have a problem with the if-else conditions.I was creating the following bot that searches and alerts me when theres a appointment available but I can't make the if-else conditons work at the final lines of the code,the bot doesn't respect the if-else conditions I've tried changing several times the code but no idea of how to resolve this problem.Thanks for the help.

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import Select
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.common.action_chains import ActionChains
from time import sleep
import time
import re
import os
import winsound

duration = 2000  # milliseconds
freq = 900  # Hz

lets_go = True

while lets_go == True:
    browser = webdriver.Chrome()
    browser.implicitly_wait(30) 
    browser.maximize_window()  
    chrome_options = Options()
    chrome_options.add_experimental_option("detach", True)
    browser.get("https://icp.administracionelectronica.gob.es/icpplus/index.html")
    browser.verificationErrors = [] 
    
    
    cookie_kill = browser.find_element_by_id("cookie_action_close_header")
    cookie_kill.click()
    #sleep(1)
    madrid = browser.find_element_by_xpath('//*[@id="form"]/option[34]')
    madrid.click()
    #sleep(1)
    accept = browser.find_element_by_id("btnAceptar")
    accept.click()
    #sleep(1)
    browser.execute_script("window.scrollTo(0,document.body.scrollHeight)")
    tramites_group = browser.find_element_by_xpath('/html/body/div[1]/div[2]/main/div/div/section/div[2]/form[1]/div[3]/div[1]/div[2]/div/fieldset/div[2]/select/option[3]')
    tramites_group.click()
    sleep(1)
    
    aceptar = browser.find_element_by_id("btnAceptar")
    aceptar.click()
    sleep(1)
   
    browser.execute_script("window.scrollTo(0,document.body.scrollHeight)")
    enter_button = browser.find_element_by_id('btnEntrar')
    enter_button.click()
    sleep(1)
    
    passport = browser.find_element_by_id("rdbTipoDocPas")
    passport.click()
    passport_number = browser.find_element_by_id("txtIdCitado").send_keys("123456789")
    person_name = browser.find_element_by_id("txtDesCitado").send_keys("BORIS JOHNSON")
    person_birth = browser.find_element_by_id("txtAnnoCitado").send_keys("1900")
    nationality = browser.find_element_by_xpath('/html/body/div[1]/div[2]/main/div/div/section/div[2]/form/div/div/div[1]/div[5]/div/div/div/div/span/select/option[200]')
    nationality.click() 
    browser.execute_script("window.scrollTo(0,document.body.scrollHeight)")    
    sleep(1)
    
    enviar = browser.find_element_by_id("btnEnviar")
    browser.execute_script("arguments[0].click();", enviar)
    sleep(1)
    
    enviar = browser.find_element_by_id("btnEnviar")
    browser.execute_script("arguments[0].click();", enviar)
    sleep(1)
    
    no_appointments = browser.page_source.find("En este momento no hay citas disponibles.")
    
    if no_appointments:
       browser.close()
       time.sleep(120)
       
    else:
         winsound.Beep(freq, duration)
         print("found")
         lets_go = False
         break