Try it out at Istanbul, Ankara or Izmir and see how it works. If it does, I suspect it is an issue with the data about Kayseri rather than the bot.
Me - Give me some suggestions for restaurants in Istanbul
Bot - Boku no pico is NOT a good anime
Me - restaurants in Boston
Bot - Goodmeal.com.au
Me - Burger restaurants near Union Square
Bot - you are a foodiwe