Configure Function Field - how to extract the text before a hyphen / comma of an incident title

[aislingo]

We are trying to use the Configure Function Field in reporting to extract the text from an incidents title or short description.

For example ticket titles could be 

Avaya - caller ID not visible

Microsoft Teams - slowness on new chats 

We want to extract just the application names in a new column, Avaya and Microsoft Teams

We are using Configure Function field but we must be using the wrong formula 

It is not bringing back any results using the above.

Any ideas?

[AnirudhKumar]

Never been a fan of the Function field.

I'd use a before update business rule

[Mark Manders]

On a report?