It would be good to be able to greet npcs and say the first sentence in one line.
For example talking to carmen:
hi heal me please
A simple possibility would be to terminate the two sentences by a dot, e.g.: "hi. heal me"
It could be useful, in theory.
Some npcs, we control their behaviour by using the separation.
Please take a look at dr feelgood and the ZooFood quest for an example.
He is supposed to go immediately idle when you say hi. quite a few others also have a specific response on 'hi' (e.g. producer code).
One should be careful and check changes in behavior - meaning quest chats aren't followed as normal (as an example).
Some people have have a 'hi' with a condition checking for quest progress. "Is that item for me?"