One-line interview email with no phone details

I received an one line email early last week from a company asking for me to come in for an interview. I wrote back saying I would be able as I was interested in the job but at a different time if possible. Another one-line reply came saying they were able to facilitate that. I wrote back asking for who I was meeting and what building I need to go to etc. No reply back.

His emails contained no signature or no phone number and I received no phone call. I can't find him on Linkedin and when I googled him I could not see his name connected to the company involved. Has anybody else had this type of experience? I find it kind of unusual if I am honest. Are they just testing as to who will give them the best most fitting reply?