Nexmo Inbound message tracking

I have used below code to send the message using Nexmo. which is running successfully and I am getting unique messageId in response.

$url = 'https://rest.nexmo.com/sms/json?' . http_build_query(
                [
                    'api_key' => env("NEXMO_API_KEY"),
                    'api_secret' => env("NEXMO_API_SECRET"),
                    'to' => $data['to'],
                    'from' => $data['from'],
                    'text' => 'Hi I am sending the message',
                    'callback' => $data['callbackUrl']
                ]
            );
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($ch);
        $data = json_decode($response);

Response: "message_id": "0D000000890273B7".

After sending the SMS, my customer replied the SMS. and I am trying to track the messages and stored into DB. I have set the webhooks callback URL on Nexmo setting. which is also running and dumped the response.

[msisdn] => 121#######
[message_id] => 0B000000CB352009
[to] => 1#########
[message_timestamp] => 2018-04-09 15:04:45
[keyword] => YES
[text] => Hello I am replying the message.

Here I noticed that messageId is coming different, so How can we track the replied message is related to this messageId "0D000000890273B7"? Please help me out. I cannot match with phone number because we are not using phone number as unique.

via Chebli Mohamed