A couple of expressions that would have made a drunken sailor blush ran through Oliver's mind, but were repressed as quickly as they had come. Cussing, no matter how creative, wasn't going to get him out of this particular spot of trouble.
Oliver turned around slowly, somewhat reassured by the fact that the voice sounded young and female. Not exactly the sort of person Death Eaters preferred to recruit. He smiled at the woman and held up his hands in an universal gesture that said 'look at me! I'm completely harmless'.
"You startled me, Miss. What are you doing out here at this time of the night? Are you from around here?" Having had a close encounter with Muggles once before, Oliver was prepared this time. He had a full cover story which he launched into enthusiastically. Let's see how convincing he could fake being a Muggle.
"You see, my fiancé and I are looking to settle down. Is this a good place to live?"