Now people will be prompted to begin a new session after they ask five questions and the chatbot answers five times.

“Very long chat sessions can confuse the underlying chat model,” Microsoft said on Friday.

On Wednesday, the company wrote in a blog post that it “didn’t fully envision” people using the chatbot “for more general discovery of the world, and for social entertainment.” The chatbot became repetitive and, sometimes, testy in long conversations, it said.

Microsoft said its data showed that about 1 percent of conversations with the chatbot had more than 50 messages. It said it would consider increasing the limits on questions in the future. The company is also looking at adding tools to give users more control over the tone of the chatbot.