public string updateRecord(int serviceId)
        {
            using (ChatServerModelContainer context = new ChatServerModelContainer())
            {
                // "id" is the id in your table (parameter passed)

                Notifications jnr = context.Notifications.Where(n => n.ServiceId.Equals(serviceId)).FirstOrDefault();
                jnr.Status = "Sent";
                context.Entry(jnr).State = EntityState.Modified;
                context.SaveChanges();
                return("Sent");
            }
        }