Why would a guy ignore your question?

So met this guy on a dating app. We exchange a few messages back and forth on the app. I asked to speak on the phone, which he agreed to. He never gave me a time for the next day to speak. I had to follow up with him. When we did speak and at the end of the phone call, he asked to meet- he's not specific about what like for drinks or dinner. I ask for drinks, and we come up with a day. The next day, he cancels and asks for a different day, which we agreed to. I then text him to confirm the plans of getting drinks are still good, and he just ignores that. Why?

Why would a guy ignore your question?
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