Basically this is what i am looking for .
Service desk ticket is created by customer.
and there is internal ticket that clones the service desk ticket when the above ticket is valid .
Validity is checked by one of the users.
After cloning . the two tickets must be synched.
Meaning if it is work in progress , the customer must be aware of it and all the particpants should be aware of it.
and once it is closed it should close the ticket in the internal project and also the main project.