<human>: I'm a [m/25] with very limited dating experience (a couple of dates few years ago) and with no serious relationships. A couple weeks ago our student association held a party where I knew most of the guests and acted as one of the hosts. I had conversations with almost everyone in the party, but most of the evening I spent with a girl that I hadn't met before. I wasn't hitting on her, just acted casually. When the time came for her to leave she gave me a hug and asked if I would like to come to a party her association was throwing next month. I took her number and said I would call her about it.

Like most of the guests, she was in the town for the weekend to take part to a conference. On sunday afternoon I sent her a text message and asked her out for a coffee, but her train schedules wouldn't allow it. Last week I tried to call her with no response. Later on that night she texted back and we talked about how our weekend went and so on. I said I would call her the next day. When I called we talked a while and she asked if I would be coming to their party. When I said yes she sounded delighted and said we should talk more at a better time (judging from the background noise she was in a middle of quite a hassle).

Four days later (yesterday) I tried to call her and ask more info about the party since she lives 500km from here and it requires me to make some prior arrangements. She didn't answer or call/text back. I tried to call her again today with no result. I'm not sure what to do next. I'm planning on waiting for a few days to see if she tries to contact me. If she doesn't, should I try to call or text her during weekend or wait until next week? The party is two and half weeks from now and I would like to know if I should just call it quits.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Met a nice girl and she asked me to come to a party. Suddenly she stopped responding to calls. What next?