小白兔, please help again

I had infopass regarding my i-485(based on 130)two days ago and spoke to immigration officer. She said my case still pending in another local office, she only can tell is my case still pending.

I had interview 2 years ago.

because we can not get infopass to the local office(the local office does not issue infopass), so the officer suggested to let me write letter to the local office.

Would you please tell me ow to write the letter.

Thanks