<human>:  Can you help me to figure out the best routes for a road trip from Houston to San Antonio?
<bot>: Sure, I can help you figure out the best routes for a road trip from Houston to San Antonio. The quickest route is to take Interstate 10, which will get you there in three hours and 30 minutes. You can also take Highway 71, which is a more scenic route and takes around four hours. You can also opt for Highway 90, which will get you to San Antonio in 4 hours and fifty minutes.