Why did the guy I match on Hinge not text me back?

I don’t use dating apps at all. I figured I give Hinge a try rather than Tinder. I sent a rose to a guy not thinking he would respond back to me answering his prompt but he did. And I flirted back. A simple exchange about getting ice cream maybe as he was the one to say “let’s get ice cream.” He then gave me his phone number and said “text me”. I responded an hour later saying “okay bet.” So I texted him with the number he gave me last night a simple “Hey it’s (blank). What’s up?” But he hasn’t responded. What’s up with that?
Why did the guy I match on Hinge not text me back?
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