You can modify the format of the event title Clara uses here.
Here are the current event title options, along with examples:
First Names, Company
Ellie (Company 1) <> Jackie (Company 2)
Full Names, Company
Ellie Arroway (Company 1) <> Jackie Hall (Company 2)
First Names
Ellie <> Jackie
Full Names
Ellie Arroway <> Jackie Hall
Meeting Type, First Names, Company
Call: Ellie (Company 1) <> Jackie (Company 2)
Meeting Type, Full Names, Company
Call: Ellie Arroway (Company 1) <> Jackie Hall (Company 2)
Meeting Type, First Names
Call: Ellie <> Jackie
Meeting Type, Full Names
Call: Ellie Arroway <> Jackie Hall
Note: If Clara doesn't know the participant's last name or company, they will not be included.