Project ended while RFE in progress

This is my first post in this project got ended while amendment RFE in progress, RFE reply date will be in 2 weeks only. When I talk to my employer he says they will cancel/withdraw the amendment petition. Is it possible once RFE issued to withdraw petition?? Meanwhile I got another employer with a new project and they are ready to transfer h1b. But that trasnfer wont take place immediately atleast one it take 3 weeks. I have approved 140 with PD in 2012.

As well my employer requested for amended petition revoke? if my employer cancel h1b am I be out of status? or grace period applies automatically?