public ActionResult SelectFriends(string searchTerm)
        {
            var loggedUserId = this.User.Identity.GetUserId();

            // Take friend relaions where friend's name contains searchTerm
            var friendRelations = this.Data
                 .FriendRelations
                 .All()
                 .Project()
                 .To<FriendRelationViewModel>()
                 .Where(fr =>
                                     ((fr.FirstUser.Id == loggedUserId && fr.SecondUser.UserName.ToLower().Contains(searchTerm.ToLower())) ||
                                     (fr.FirstUser.UserName.ToLower().Contains(searchTerm.ToLower()) && fr.SecondUser.Id == loggedUserId)) &&
                                    (fr.AreFriends == true))
                                    .ToList();
            if (friendRelations.Any())
            {
                // Extract friends users from friend relations
                var users = new List<UserViewModel>();

                foreach (var friendRelation in friendRelations)
                {
                    users.Add(friendRelation.FirstUser.Id == loggedUserId
                        ? friendRelation.SecondUser
                        : friendRelation.FirstUser);
                }

                var chats = new List<ChatViewModel>();

                foreach (var user in users)
                {
                    // Check if two users had already chat, if not create new chat
                    var chat = this.Data.Chats.All().Project().To<ChatViewModel>().FirstOrDefault(ch =>
                        (ch.FirstUser.Id == user.Id && ch.SecondUser.Id == loggedUserId) ||
                        (ch.FirstUser.Id == loggedUserId && ch.SecondUser.Id == user.Id));

                    if (chat == null)
                    {
                        var newChat = new Chat()
                        {
                            FirstUserId = loggedUserId,
                            SecondUserId = user.Id,
                            Messages = new List<Message>()
                        };
                        this.Data.Chats.Add(newChat);
                        this.Data.SaveChanges();

                        var newChatToView =
                            this.Data.Chats.All()
                                .Project()
                                .To<ChatViewModel>()
                                .FirstOrDefault(ch => ch.FirstUser.Id == loggedUserId && ch.SecondUser.Id == user.Id);

                        chats.Add(newChatToView);
                    }
                    else
                    {
                        chats.Add(chat);
                    }
                }

                var returnFriendsMessages = chats
                    .ToDictionary(chat =>
                    chat.FirstUser.Id == loggedUserId ? chat.SecondUser : chat.FirstUser,
                    chat => chat.Messages.Any() ? chat.Messages.Last() : null);

                return PartialView("_DisplayFriendsMessages", returnFriendsMessages);
            }
            return new EmptyResult();
        }