Write to a friend who used to live in your neighborhood or go to your school. Tell your friend about the things that have happened or changed since you last saw each other.

Hey, *name of friend*!
It’s been quite a long time since we’ve seen each other. How are you doing recently? I’d like to hear how you’ve got on since I’ve moved out of town.
I missed how we used to play in your back garden every single day in the afternoon, kicking footballs around and playing hide and seek. Ah, good memories!
I was wondering if you would like to see each other again soon… How does that sound? We could go out and enjoy some delicious ice cream by the beach, or we could visit the local park - like old times. I’ve missed you a lot ever since I’ve moved neighbourhoods. We used to have so much fun together, I hope to see you again soon.
I’m excited to hear from you soon, see you around!

So kristen decided to call a taxi. “so” is a subordinating conjunction.