<human>:  What are the ingredients for a banana smoothie?
<bot>: Ingredients for a banana smoothie: 
1. 2 ripe bananas 
2. 1 cup of milk 
3. 2 tablespoons of honey 
4. A handful of ice cubes 
5. 2 tablespoons of Greek yogurt, optional 
6. A pinch of ground cinnamon, optional