Askin for permission

Ventura: Tom's got two tickets for the Jamelia concert on Friday. Can i go with him?
Narcís: where's the concert?
Ventura: It's at Wembley Arena. I've got some money for the ticket.
Narcís: OK. I suppose so.
Ventura: And can I stay at Tom's house after the concert?
Narcís: No, sorry,you can't.
Ventura: Why not?
Narcís: Because it's Dad's birthday on Saturday.
Remember?
Ventura: Oh, yeah. I remember.