My dad was a fan of the Canadian rock band Rush. Ever heard of them?
Yes, but i don't know much about them.
Rush was made up of Alex Lifeson, Geddy Lee, and Neil Pert.
When was this?
They formed the band Rush back in 1968. 
Are they still together or too old now?
They still play. Rush has sold over 65 million albums worldwide as of 2017.