What to say after you both said yes
Dear Future Match,
Congratulations. You haven't happened yet, but you will. Somewhere out there, two people are about to have a very good five minutes, both say yes, and find a chat window waiting for them.
This letter is for right after that moment, because a surprising number of good matches go quiet in the next hour.
Write first, and write soon
The best time to send a first message is while the date is still warm, ideally within the hour. You both just said yes; nobody is playing it cool anymore. Waiting three days is an old rule from an era when people had to wonder whether they were liked. You don't. You already know.
Pick up a thread
You just talked for five minutes, so you have material. Use it.
Bring back something they said: "I'm still thinking about your theory on airport sushi." Finish a story you ran out of time for. Ask the question you wanted to ask when the timer hit zero.
A message that could only have been sent to them lands very differently from "hey, nice to meet you."
Suggest the next thing
A good first message has somewhere to go. It doesn't need to be a grand plan. "I'd love to hear the rest of that story, are you free for a call this week?" is plenty. Specific beats vague, and a question beats a statement.
The first date was five minutes. The second one can be as long as you both like.
And if it fizzles
Sometimes it does, and that's fine. You can hide a conversation from your inbox, and if someone makes you uncomfortable you can block or report them in a couple of taps. Then you go on your next date. There is no daily limit on those, and no one to explain yourself to.
We can't wait to meet you, Future Match. Well, technically we'll never meet you. But someone will, for five minutes, and that's the whole point.