Provide the theme summaries for the following conversation: 

Diana: How much do you charge for an hour lesson?
Kas: It is 12GBP per hour in house plus milage.
Kas: At the moment I have the following slots available: Weekends, after 4pm on Thursday and all day Friday.
Diana: I would want lessons for my 12 year old daughter. Do you teach children?
Kas: Yes we do although we mainly teach adults.
Diana: We live in Nailsea. Can you come and teach her on Tuesdays at 4pm?
Kas: Unfortunately Tuesdays are already fully booked. But I can teach her on Thursday or Friday. However I would have to charge milage to come out.
Kas: Milage is 50p per mile there and back.
Kas: Nialsea is 10 miles from us so that would make 22GBP per hour if I come out to you.
Diana: That is really expensive. Fuel doesn't cost that much!!!
Kas: That's true but I have to charge for my time and travel time is still time.
Diana: OK. Thanks for the info. We'll think about it.
Kas: If you want to keep the costs down you can always come to our place. We do teach from home.

Summary: 
Kas charges 12 pounds per lesson plus 50p per mile there and back for mileage. Kas is available on weekends, on Thursday after 4 PM and all day on Friday. Kas teaches children as well. It would cost 22 pounds per hour, if Kas came to Nialsea for lessons. Kas teaches from home too.