It's very easy to come to Goreme - Cappadocia. You can use one of the following ways to come to Goreme.
1. By plane from Istanbul to Kayseri, then take bus from Kayseri to Goreme(70 km).
2. Directly by bus from Istanbul, Ankara or Izmir to Goreme. Also, there are many bus companies which have direct bus services to Goreme from other cities.