There are various reasons for using the meeting people protocol. Sometimes it's for what is called getting to know people, which is kind of like increasing your page rank with them.
This is often achieved by further exchanges after the initial stages of the protocol, called small talk, which is not to be confused with Smalltalk. These exchanges are more content-rich than the initial stages, yet needn't be cached. The statements that form this small talk depend on the context, but in some locales a comment on the weather is perfectly acceptable. This comment needs to be short, something like "nice weather we're having". Any detail on precipitation, or mentions of any weather telemetry equipment you may have recently purchased are probably inappropriate.