If you bump into someone and they don’t remember your name then introduce yourself again and give them some context to jog their memory.

Everyone is shy, and most of the time they are waiting for you to initiate the conversation, send a follow up email or arrange a time to get together.

Obviously read the room and don’t make time for weirdos, but making the first move in a considerate and respectful way save you time and is welcomed with a sigh of relief most of the time.