I want to が多用されているので減らしてみました。
# Please come and visit us. は visit us ですか?
# この短いスピーチに、IN Conclusion I want to visit London. は要らないと思います
Hello everyone, I'm xxxxx.
I want to visit London for three reasons.
The first reason is to see Tower Bridge at night. It's so beautiful.
The second is to ride big ferris wheel called the London Eye.
I want to overlook the city of London from 135 meters high.
The third is to eat delicious cupcakes. There are many cupcake shops in London.
I want to eat it with my friends and family.
Thank you for listening.