[you are seriously cracked. He's a little taken aback with Smoker knowing Luffy but then Luffy would have left by now and would have to pass through Loguetown to get on the Grandline. He's surprised and impressed he has an epithet already but..

As for the rest of it]

You must be infected by Marco's dream. I've never been to Alabasta I said. [and even if he had and did't know it, which was probable, he would have remembered meeting Luffy]

How should I know what this place is? [He wants to tell him to ask Marco but then remembers that Marco would either lie to him or shred him or probably shred him and lie at his corpse --if Smoker even went there.

Maybe he can ask Marco later]

Anyway don't worry about it.