Guys, Was asked on a date but he didn't confirm the time, its been 3 hours since he texted me what should I do/text?

How should i respectfully text him im not interested with seeing him today due to him not setting a time / etc. Or should i not say anything at all?

Guys, Was asked on a date but he didn't confirm the time, its been 3 hours since he texted me what should I do/text?
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