Is there a term in English for a phrase that is sort of a filler?

For instance: My car burst into flames.

(Phrase in question) “That’s not so good”

The phrase is a filler. It acknowledges that something happened, but it offers no additional information nor does it permit going further into conversation.

Essentially, a relative of mine constantly throws these phrases throughout a conversation and it stops the conversation dead in its tracks. It’s really annoying. I want to find more of these and kill fire with fire.