Mainly
I am sure that when I speak to someone I've met before, or any stranger I have never met, their prime goal is, instantly, within seconds, to stop me talking, without letting me know why. They will hang up the phone, show me the door, using force, if required.
I do predict this immediately. I assume it. It is never otherwise. I would give any person unlimited time. I have no desire to abort anything. I like to engage in a sharing of thoughts and opinions, etc...
If shouted at, to convince me to leave, it won't necessarily happen. When they walk the other way, I might pursue them.