Hey, there is no way actually. It's not possible to transfer services to another account. you cannot move a running instance from one account to another.
This is from AWS Documentation:
AWS Support does not have access to copy Amazon EC2 resources or manipulate any configuration options in AWS accounts. You can't separate an AWS account from an Amazon.com account or transfer resources between AWS accounts. It is possible to manually migrate Amazon EC2 resources from one account to another by completing the steps described here.