' If you want to meet for a coffee just call me '

While I was at Café Kom Koi I bumped into a Tunisian woman , who was with her son; she suggested meeting up for a coffee another time. The trouble is I don't know who she is - during the four years I've been here in Tunisia I've met quite a few students and teachers so she could be anyone! I've got no idea! So I can't call her as I haven't got the faintest idea who she is!