Hi Jose,

Thanks for inviting me, yes I really like live music gigs and the band that will perform at the open-air concert this Saturday is one of my favourites. But I'm not sure if I will be able to make it because I got some things to do this weekend. I have to help my parents with a few things. 

Anyway, I will tell you for sure if I can go or not this friday. If I can't get there I hope that atleast you guys will enjoy it :).