After going through a DIY tutorial on the Net I could smoothly have "Alexa" Voice Assitant working using my Raspberry Pi 3. My JBL Flip 3 Speakers gave me the amazing audio feeling which I presume would be similar to Amazon Echo device. Since I did not have dedicated USB mic, I used my Logitech USB H340 USB Headset. Enjoy this demo of "Alexa" Voice assistant and get the feel of Amazon Echo even without buying anything.
Video recorded by Baudhayan Lahiri using Xiamo Mi 5 Phone.