Word for "random talk" [duplicate]

A fellow on a social site suddenly starts asking me where I am from and what my interests are. I want to tell him that I am not interested in a random conversation and that I'll only answer if he's looking for any certain information.
Now, is there a better phrase or word for random conversation? Something that means, sudden useless or pointless talk. I want a more subtle but powerful word.

Small Talk is an informal type of discourse that does not cover any functional topics of conversation or any transactions that need to be addressed.

You may use the term chitchat:

friendly conversation about things that are not very important

(M-W)

• the occasional idle chitchat about nothing important.

“Chatter” would be a good word to use.