@Chantal480 this person is clearly new and might simply not know how airbnb works, that it is customary to communicate after booking and before arrival and that host may want to know more. She might not have her messages set up to show in her email or text. There is no reason to assume there is a conspiracy to be a bad guest or that she will turn out one. All of us were new to something at one point in our lives or anther. Just imagine if other people "cancelled you" every time you were new at doing something and were not just perfect at it.
Why not pick up a phone and give her a call? Very simple. Ask all the questions you need and get a feel for this guest. So much gets lost when emailing/messaging anyway.
He/she might also just be busy. This summer I had to travel for work and neglected to respond to my hosts until right before check in. Yes, I should have known better but I worked 16 hour days. I am sure it was super annoying to hosts and I had many reviews as both guest and host to back me up but it also did not make me a bad enough guest to cancel.
You are in hospitality business. You should not follow your gut when you have zero facts. If the conversation truly does not go well (not because you get into it looking for proof of your gut feeling), then you can make a decision. If you cancel now, it is not your guest who is bad, it is you being a bad host.
If you feel you need to screen your guests very thoroughly and only want a certain type, you should remove IB and set different settings (only guests with reviews etc). You can also inlcude questions every guest must answer as well as a blurb in your listing: "please let me know the reason for your visit when you inquire" or whatever else you would like to know. You will probably have fewer guests, at least at first but you will be in full control of who comes to your home.