On a deeper research performed, it seems that the phone does not have a recovery option and there is CWM (ClockWork Mod) recovery but it has to be flashed using custom tools which are not officially supported or recommended by Lenovo. If you still have problems, please take the phone to the actual Lenovo service or to a local phone service and it will be unlocked in seconds for a very small fee. If you were trying to flash the CWM, the phone might get bricked meaning that professional help is recommended in this case.
If you have selected USB Debugging and you know that it's enabled, you can use ADB to reset the pattern.
Start Command prompt and type: adb shell then use the following command:
Reboot the phone and you can enter any gesture while you are on the pattern screen which you can then later change it in the Security menu.