I think that depends on how 'over the top' I'd go.

[ She looks relieved at the latter, and then bemused. ]

Heavens forbid. I'll ... do that. [ Well she would anyway so she doesn't mind so much, that offhanded comment. Although now she's going to say hello to every tall, slender man with dark hair and leather coat she sees. ]

Ah, yes, that's definitely something to be avoided. [ She stands when he does, moving to see him to the door. ]

It was lovely speaking with you John - and again, thank you for your help. Feel free to stop by any time, alright?