Do you think she's interested?

[Ellen]

Just before she stopped answering did you ask her a question? Or say anything that might make her feel a bit uncomfortable? If so then she might just not feel comfortable talking to you so doesn't want to talk again. Or she may have just been carrying on with you and not looking to get close or anything.
But then again, her phone could have just died or she might have fell asleep and might talk to you today? Try popping up to her saying Hey with a smiley and see is she replies
Hope this helps