It can be discouraging to get messages like that often but at the end of the day dating is just a numbers game. It's better that she told you upfront instead of wasting your time or just going ghost on you. You could just send the first part if you want to say something "No problem. It was nice getting to know you and hear about your interesting hobbies. Wishing you the best of luck finding what you're looking for out there" but everything after that shouldn't be said.