Telemarketing and Research

I am looking for a telemarketer who is experienced in inviting people to conferences and events. These events are free, but the people we want to have attend are highly-sought after. We will be calling first to offer information and then to follow up. We will supply lists but the telemarketer needs to update them and let us know the changes.
Some of these calls will be to Asia, so the telemarketer will need to call to those regions. We will either reimburse you for calling expenses or top up your calling account.
You will need to provide references and have relevant conference or event experience.