# -*- coding: utf-8 -*-
import time
import vk_api

from socket import gethostbyname
 
vk = vk_api.VkApi(token = 'твой токен')
 
param = {
    'count' : 1,
    'time_offset' : 5,
    'filter' : 'unread'
}

def write_msg(user_id, msg, random):
    vk.method('messages.send', {
        'user_id': user_id,
        'message': msg,
        'random_id':random,
    })
while True:
    response = vk.method('messages.getConversations', param)
    if response['items']:
        item = response['items'][0]
        last_mess = item['last_message']
        random = last_mess['random_id']
        my_id = last_mess['peer_id']
        text = last_mess['text']
        write_msg(my_id, text, random)    
    time.sleep(1)