Well I'd give her something to do that requires interaction..
Surveys, asking people questions
Lost & Found.. you found something in the corner and wonder if is theirs ir the reverse
Directions - you need directions to something, make it plausable and either real or not, what matters is the RP not getting directed
Selling - sell a thing or a service, like fortune telling or healing or .. etc..
Mistaken Identity - they think the other character is someone they know, great way to get them to compare them self against your made up person
You get the idea?