This kind of thing is tough to coordinate unless you have a partner you match up perfectly with in terms of your traveling styles, or you have some incentive to stay together like they are your wife or child. If you are on major touring routes you will inevitably meet up with people on the road. If you get along with them and you go about the same speed, have the same daily mileage goals, etc, you can hook up with riding partners on the route and travel together for as long as it makes sense to do so.