Hermione had received the flying memo when she was having her tea in the break room. All it had really said was that there was a huge emergency at St Mungo's and that she should go there and find out what was going on. There might have been some growling over her tea cup,before she packed up and headed over.
To her surprise there was a crowd gathering around the building but no one was being granted entrance. Seeing a familiar face she moved towards the Slytherin she probably hadn't spoken to since they had graduated.