I have a question.

Last year, I went to bookstore in America. A woman staff said "Hello" to me when I was walking in bookstore.

In Japan, shop staffs don't say "Hello(こんにちは/konnichiwa)" to costermars. They say "いらっしゃいませ(irasshaimase)" and mostly costermars don't answer.

So I didn't know what I said to her.

I answered "Hello" but was it ok? I still don't know what is the correct answers.

Thank you for reading.

Please correct this sentences if there are mistakes. And I want to solve this question. Please tell me!