How to search name in access DB and get other info about searched name in?

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C#

database

I want to make an app that needs database. I already made an access database with below information.
2 columns: Name and Family
in first row Name:John and family:wood
in second row Name:sara and family:Cage
i connected database to C# and made data adapter, data connection, dataset and data binding source and showed my file into a data grid view. till now it works perfect and i can add more names into my database but how can i search into Name column? and if Name doesn't exist show **name doesn't exist** and if it exist show her/his family in label1. i have no idea about how to search.thanks in advance.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace main
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void btnSearch_Click(object sender, EventArgs e)
        {
            //code for search
        }
    }
}