Girls, how should I tell a girl who is passionately wating to have her first date with me that I cannot see her until Monday?

I met this girl on Monday. She is clearly into me and wants to have her first date with me as soon as possible. But I cannot see her until Monday. How should I tell her this without upsetting her?

Thanks!

Girls, how should I tell a girl who is passionately wating to have her first date with me that I cannot see her until Monday?
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