How Client send info to Host in Unity Multiplayer

I want to send player name and other details from client to host device. I have setup game for maximum two players connection.

Here is the code that I have tried multiple times with different changes:

     void Start ()
     {
         spriteRenderer = GetComponent<SpriteRenderer> ();
         circleCollder = GetComponent<CircleCollider2D> ();
         //        StartCoroutine (ColorSwitcher ());
         InitialTasks ();
     }
 
     private void InitialTasks ()
     {
         isAlive = true;
         GameManager.Instance.IsPlayerWin = false;
         int selectedTheme = Random.Range (0, ballSprites.Length);
         spriteRenderer.sprite = ballSprites [selectedTheme];
         trailRenderer.material = trailMaterials [selectedTheme];
         destroyParticleObj.GetComponent<ParticleSystemRenderer> ().material = trailMaterials [selectedTheme];
 
         hidePlayerName += OnTouchHidePlayerName;
 
         if (!isLocalPlayer) {
             // remote player
             gameObject.tag = GameConstants.TAG_REMOTE_PLAYER;
         } else {
             // local player
             Debug.Log ("locally set player name: " + DataCollection.localPlayer.PlayerName);
             playerNameText.text = DataCollection.localPlayer.PlayerName;
             StartCoroutine (SomeDelayForSendingPlayerDetails ());
         }
 
 
 //        if (isServer)
 //            RpcSetRemotePlayerName (DataCollection.localPlayer.PlayerName);
 //        else
 //            CmdSetRemotePlayerName (DataCollection.localPlayer.PlayerName);
     }
 
     IEnumerator SomeDelayForSendingPlayerDetails ()
     {
         yield return new WaitForSeconds (0.5f);
         CmdSetRemotePlayerName (DataCollection.localPlayer.PlayerName);
     }
 
     [ClientRpc]
     private void RpcSetRemotePlayerName (string remotePlayerName)
     {
         playerNameText.text = remotePlayerName + "@";
         Debug.Log ("rpc remote player name: " + remotePlayerName);
     }
 
     [Command]
     private void CmdSetRemotePlayerName (string remotePlayerName)
     {
         RpcSetRemotePlayerName(remotePlayerName);
             Debug.Log ("cmd remote player name: " + remotePlayerName);
     }

At present Host can able to send information to other connected client but client can't able to send message to connected Host.

Please give me some help for this.