根据以下情境写一个对话场景：一个人在咖啡店里想要点咖啡，但是不知道该点什么。


Person: "Excuse me, I would like to order a coffee, but I don't know what to get."
Barista: "Sure! What kind of taste do you prefer? Bitter, sweet, or mild?"
Person: "I prefer mild." 
Barista: "Great! We have a few options for that. We have our house blend, a Colombian roast, and a Kenyan roast. Which one would you like to try?"