Cannot run program "Composer" - composer-php

Question

I'm working with Symfony 3. I used FOSCommentBundle on my project, it uses assetic-bundle which is not supported by Symfony 3. I tried running the command composer require symfony/assetic-bundle
but I keep getting:
Cannot run program(in directory "C:\wamp\www\myProject") "composer"CreateProcess error=2".
Ps: I'm a beginner
{
"name": "symfony/symfony",
"type": "library",
"description": "The Symfony PHP framework",
"keywords": ["framework"],
"homepage": "https://symfony.com",
"license": "MIT",
"authors": [
{
"name": "Fabien Potencier",
"email": "fabien#symfony.com"
},
{
"name": "Symfony Community",
"homepage": "https://symfony.com/contributors"
}
],
"require": {
"php": ">=5.5.9",
"doctrine/common": "~2.4",
"twig/twig": "~1.28|~2.0",
"psr/cache": "~1.0",
"psr/log": "~1.0",
"symfony/polyfill-intl-icu": "~1.0",
"symfony/polyfill-mbstring": "~1.0",
"symfony/polyfill-php56": "~1.0",
"symfony/polyfill-php70": "~1.0",
"symfony/polyfill-util": "~1.0",
"symfony/assetic-bundle": "~2"
},
"replace": {
"symfony/asset": "self.version",
"symfony/browser-kit": "self.version",
"symfony/cache": "self.version",
"symfony/class-loader": "self.version",
"symfony/config": "self.version",
"symfony/console": "self.version",
"symfony/css-selector": "self.version",
"symfony/dependency-injection": "self.version",
"symfony/debug": "self.version",
"symfony/debug-bundle": "self.version",
"symfony/doctrine-bridge": "self.version",
"symfony/dom-crawler": "self.version",
"symfony/event-dispatcher": "self.version",
"symfony/expression-language": "self.version",
"symfony/filesystem": "self.version",
"symfony/finder": "self.version",
"symfony/form": "self.version",
"symfony/framework-bundle": "self.version",
"symfony/http-foundation": "self.version",
"symfony/http-kernel": "self.version",
"symfony/inflector": "self.version",
"symfony/intl": "self.version",
"symfony/ldap": "self.version",
"symfony/monolog-bridge": "self.version",
"symfony/options-resolver": "self.version",
"symfony/process": "self.version",
"symfony/property-access": "self.version",
"symfony/property-info": "self.version",
"symfony/proxy-manager-bridge": "self.version",
"symfony/routing": "self.version",
"symfony/security": "self.version",
"symfony/security-core": "self.version",
"symfony/security-csrf": "self.version",
"symfony/security-guard": "self.version",
"symfony/security-http": "self.version",
"symfony/security-bundle": "self.version",
"symfony/serializer": "self.version",
"symfony/stopwatch": "self.version",
"symfony/templating": "self.version",
"symfony/translation": "self.version",
"symfony/twig-bridge": "self.version",
"symfony/twig-bundle": "self.version",
"symfony/validator": "self.version",
"symfony/var-dumper": "self.version",
"symfony/web-profiler-bundle": "self.version",
"symfony/yaml": "self.version"
},
"require-dev": {
"cache/integration-tests": "dev-master",
"doctrine/cache": "~1.6",
"doctrine/data-fixtures": "1.0.*",
"doctrine/dbal": "~2.4",
"doctrine/orm": "~2.4,>=2.4.5",
"doctrine/doctrine-bundle": "~1.4",
"monolog/monolog": "~1.11",
"ocramius/proxy-manager": "~0.4|~1.0|~2.0",
"predis/predis": "~1.0",
"symfony/phpunit-bridge": "~3.2",
"egulias/email-validator": "~1.2,>=1.2.1",
"symfony/polyfill-apcu": "~1.1",
"symfony/security-acl": "~2.8|~3.0",
"phpdocumentor/reflection-docblock": "^3.0"
},
"conflict": {
"phpdocumentor/reflection-docblock": "<3.0",
"phpdocumentor/type-resolver": "<0.2.0"
},
"provide": {
"psr/cache-implementation": "1.0"
},
"autoload": {
"psr-4": {
"Symfony\\Bridge\\Doctrine\\": "src/Symfony/Bridge/Doctrine/",
"Symfony\\Bridge\\Monolog\\": "src/Symfony/Bridge/Monolog/",
"Symfony\\Bridge\\ProxyManager\\": "src/Symfony/Bridge/ProxyManager/",
"Symfony\\Bridge\\Swiftmailer\\": "src/Symfony/Bridge/Swiftmailer/",
"Symfony\\Bridge\\Twig\\": "src/Symfony/Bridge/Twig/",
"Symfony\\Bundle\\": "src/Symfony/Bundle/",
"Symfony\\Component\\": "src/Symfony/Component/"
},
"classmap": [
"src/Symfony/Component/Intl/Resources/stubs"
],
"exclude-from-classmap": [
"**/Tests/"
]
},
"minimum-stability": "dev",
"extra": {
"branch-alias": {
"dev-master": "3.1-dev"
}
}
When I run composer require symfony/assetic-bundle -vvv this is what I get:
Cannot run program "composer" (in directory "C:\wamp\www\myProject"): CreateProcess error=2,
The specified file can not be found