Not able to get response from esp using Arduino uno
SoftwareSerial ESP(0,1); // RX, TX


Pins 0 and 1 are hardware serial on the Uno, used with the Serial object, these pins are used to communicate with your computer (e.g. Serial Monitor) via the USB-serial chip on the Uno.

There is absolutely no reason you should ever use SoftwareSerial with pins 0 and 1. If you want to use software serial then connect the ESP8266 to pins other than 0 and 1. Otherwise don't use SoftwareSerial at all, but be aware that using Serial to communicate with the ESP8266 and with the computer is problematic and can also cause issues when you try to upload to your Uno.