Earlier quoted context omitted.
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.
I'm currently using data from Yelp, and chances are that Yelp is not too popular in some countries. Is TripAdvisor the go-to for Istanbul? I have toyed with the idea of implementing Yelp, TripAdvisor and Google Place for different countries due to their database.
The problem seems, the bot acts weird if it founds no data, or it really doesn't understand the phrase.