<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
What is the tallest building in the world?<|im_end|>
<|im_start|>assistant
The current (2023) tallest building in the world is.

Burj Khalifa: located in Dubai, United Arab Emirates.

Interesting facts:
At 828 m [2,716 ft 6 in] tall, this building is more than twice the height of the Empire State Building.
It also has the tallest elevator in a building 504 m [1,654 ft]  
163 floors, the most in a current building 
Plus the loftiest restaurant at 441.3 m [1,447 ft 10 in]<|im_end|>
<|im_start|>user
Wow that's tall, but how tall is its spire?<|im_end|>
<|im_start|>assistant
The antenna spire is 242.6 meters or 796 ft.<|im_end|>