WhatsApp chatbot with Twilio using Php - php

Question

I am trying to create a chatbot using laravel php and Twilio Api. I am still in sandbox. This the code i currently have
public function commandHandler(Request $request){
$from = $request->input('From'); // phone number where the message is coming from
$body = $request->input('Body');// what user wrote
$client = new \GuzzleHttp\Client();
try {
$response = $client->request('GET', "https://api.github.com/users/$body"); //test if network is working
if ($response->getStatusCode() == 200) {
$message = "Welcome to System. \n";
$message .= "To Log In, Enter Email Address";
$this->sendWhatsAppMessage($message, $from);
} else {
$this->sendWhatsAppMessage("Error", $from);
}
} catch (RequestException $th) {
$response = json_decode($th->getResponse()->getBody());
$this->sendWhatsAppMessage($response->message, $from);
}
return;
}
I can get what user has typed from the variable $body and send user back a message through the function
$this->sendWhatsAppMessage($response->message, $from);
but the problem is when i want the user to enter password, it goes to the same url and does the same functions of which i would like for it to do different functions. Twilio only accepts one call-back url which i have to use that one function only. How do i use different functions for different messages sent to the user
this is what is in my api.php
Route::post('/chat', 'App\Http\Controllers\ChatBotController#listenToReplies');
and that is the url in the callback of the Twilio dashboard