Likely scenario: Adam and Emma aren't friends nor acquaintances of each other, at this point in time.
Scenario 1: The only way he and Em would know each other would be if he went to the same school, which is unlikely, considering circumstances (aka: backgrounds)
Scenario 2: If HELP informed Emma about him being in town. They know of him (if I read the bio correct), so considering Em's mission, she would in this scenario have gotten a file with all the info she needs to know about him. (File likely doesn't include all the information that HELP knows, only what she needs to know) And since Emma has to keep a low profile and is supposed to not have contact with those that might expose her mission, they will have told her to steer clear unless given 0 alternatives. (Not just him, obviously, there are others) So, while Em might possibly know of Adam, it'd unlikely he knows her, and unlikely they actually met.