<human>: I'm 22 and working at a hospital. I got signed up for a 5 day study testing kinesthetics. The person conducting the study was a girl (maybe 24?) who was part of that lab. She's from England and studied at a prestigious university. I spoke to her from day 1 to day 5 of the study during breaks and such.
We grabbed breakfast together on day 3 and sat and spoke for a good 20 minutes. I asked her out on day 5 (Friday morning) and she gave me her email address. She explained that she would add me on whatsapp and we could work out the details, and also told me to email her my number.
I emailed her with a simple "hey it's Alex. My number is ...." that Friday evening. She did mention that she would be out of town with friends on Sat and Sun. She still hasn't responded (Monday evening). Maybe I'm being expecting a quick response or maybe she's just busy. I'm not sure. Is this a dead end or should I wait a few more days and email her again with a more direct "are you still interested in going out etc"? Thank you.

Can you summarize the given text in a few sentences?
<bot>: English girl gives American guy email address after asking her out, guy emails her but no response for 3 days. Wait longer or just a waste of time?