A missed connection is an occurrence where two or more people are unable to exchange contact information or the information that is exchanged is lost. These missed connections are generally associated with romance, but they may also be business-related or otherwise.

Wikipedia

Reasons for your missed connection

• You forgot to express gratitude to a stranger who helped you.
• You lost exchanged contact information.
• You couldn't muster up the courage to ask for contact details at the time of the missed connection.
• You realized that you should have asked for contact details after the opportunity has passed.
• You lost each other in crowd.
• You didn't meetup again as planned.
• Whatever reason you may have.

NOW, create your missed connection message.