Hi Italy! Here's a revised email. The tone of emails is conversational and light so I have taken out words like "Finally" and changed some other bits, though I've tried to keep your conversational tone and voice. See what you think...
You gave me good news because I'll still be working the first week in August, therefore this change is fine as I wouldn't have been available at that time.
[I imagine "at that time" refers to a previous message?]
I guess you'll really like everything in my country, especially the food which is absolutely delicious. Indeed I'll take you to taste many kinds of dishes. Besides, if I know you well, you'll surely love the art and culture of Italy.
Regarding clothes you should bring light clothing such as t-shirts, shirts, shorts, jeans and something else as
["something else" is vague]
the Italian summer is very hot, especially in my area.
The best way to get here from the airport is to take the highway. You'll find numerous signs there indicating my city. If you have any problems you can always call me.
I'm looking forward to seeing you.