Answer Bot Telegram

I want my bot to receive the user's response to a question made by the bot itself and continue with the execution of that function without starting the execution again when receiving a message.

The command I send is / vehicle route to call this function

The code I tried was this:

    $mensaje_dir = "¿Cuál es la dirección desde la que quiere partir?";

    sendMessage($chatId,$mensaje_dir);

    $update1 = file_get_contents('php://input');
    $update1 = json_decode($update1,TRUE);

    $chatId1 = $update1["message"]["chat"]["id"];
    $chatType1 = $update1["message"]["chat"]["type"];
    $direccion1 = $update1["message"]["text"];

    $dir1=str_replace(' ', '+', $direccion1);

    sleep(20);
    $mensaje_dir = "¿Hacia qué dirección va?";

    sendMessage($chatId,$mensaje_dir);

    $update2 = file_get_contents('php://input');
    $update2 = json_decode($update2,TRUE);

    $chatId2 = $update2["message"]["chat"]["id"];
    $chatType2 = $update2["message"]["chat"]["type"];
    $direccion2 = $update2["message"]["text"];

    $dir2=str_replace(' ', '+', $direccion2);

    sleep(20);
    $url = "https://maps.googleapis.com/maps/api/directions/json?origin=".$dir1."&destination=".$dir2."&region=es&language=es&key=CLAVE_API";

    sendMessage($chatId,$url);

    $ruta_d = "<b>- Inicio: </b>".$array_d['routes'][0]['legs'][0]['start_address']."<b> \n- Fin: </b>".$array_d['routes'][0]['legs'][0]['end_address']."\n\n<b>- Distancia: </b>".$array_d['routes'][0]['legs'][0]['distance']['text']."\n<b>- Duración: </b>".$array_d['routes'][0]['legs'][0]['duration']['text'];

    sendMessage($chatId,$ruta_d);

The problem is that the URL appears like this:

maps.googleapis.com/maps/api/directions/json?origin= / route + vehicle & destination = / route + vehicle & region = en & language = en & key = CLAVE_API

Instead of receiving the address that I send you by message, take as a message the command that I sent you previously. How can I get the response in the function without starting a new execution of the script?