I did a cold approach recently that has been bugging me a lot. It bugs me because I thought it went really well and the girl seemed very interested until I hit her with a text regarding logistics. I cold approached her on campus using an indirect approach. We had a great conversation for 20-30 minutes and I got her number after and waited for around 3 days before texting. In 'Day Bang' Roosh says to text for logistics only so I basically followed his script. I said hey ____, this is ____, how are you? She replied saying she was good but tired and asked how I was. I replied "Good good, do you want to hang out this week?". At this point she didn't reply back. What's the deal here. Seems like it went well up to this point so should I have had a little bit of conversation before asking her to hangout. What do you think?

Edit: One thing I forgot to mention was that when I texted her, she replied within five minutes.