How to make a VK bot on vk_api answer several people at the same time?

Question

Python

import vk_api
from vk_api.longpoll import VkLongPoll, VkEventType
import random
def write_msg(user_id,message,rand_int):
    vk.method('messages.send',{'user_id':user_id,'message':message,'random_id':rand_int})
vk=vk_api.VkApi(token=token)
longpoll=VkLongPoll(vk)
while True:
    for event in longpoll.listen():
        if event.type==VkEventType.MESSAGE_NEW:
            if event.to_me:
                rand=random.randint(10000000,90000000)
                request=event.text
                if request=='Привет':
                    write_msg(event.user_id,'Привет. ',rand)
                elif request=='Пока':
                    write_msg(event.user_id,'Пока',rand)
                else:
                    write_msg(event.user_id,'Не понял?',rand)