I need help finding an old friend in Edmonton, Canada, any thoughts?

This maybe a long shot, but I'm in Canada and I had a friend in NZ and would really like to get in touch with her again. We used to be facebook friends but I deleted my account and can't get in touch with her anymore. I don't know a massive amount except that her name is Hannah Mercer, shes from Edmonton, Canada. She'll be 22 now and used to work at Neighbourhood Macs Brew Bar with me in Auckland, New Zealand. Any thoughts or ideas would be amazing...?