Provide the theme summaries for the following conversation: 

Dad: Jon, when are you coming back for xmas? 
Jon: Well I haven't booked the flights yet
Dad: How come? you should book 'em asap! 
Jon: Yea thanks dad for reminding me 
Dad: Auntie Shayla is coming here on the 20th dec
Jon: I should fly home with her then!
Dad: Yep, she's heading back to Toronto after new year's eve 
Jon: Hmm sounds like a good plan to me. I should give her a call 
Dad: Yes. We are excited to see y'all 
Jon: Do you want anything from here? 
Dad: xmas gifts 
Jon: oh yea, I have to do some shopping xd thx for reminding me about that too 
Dad: Are you bringing Shyann home? 
Jon: No, she's going to her parents for xmas. I can't afford air tix for her xd 
Dad: Flights are fckn expensive
Jon: Ikr 
Dad: Where is she from already? 
Jon: Charlottetown 
Jon: PEI
Dad: Will she fly there? 
Jon: Yea but it's cheaper to fly to PEI than to Sask. 
Dad: I see. Book your tickets now and we'll talk about our next holiday excursions at home. Mom is excited to see y'all for Christmas.
Jon: K will do! ttyl

Summary: 
Jon's coming home for Christmas, but hasn't booked his tickets yet. He'll fly with Auntie Shayla on 20 December and go back with her to Toronto after New Year's Eve. Jon won't be coming with Shyann who's going to her parents in Charlottetown.