this might help!
Dear Senator,
We are writing this letter to request your office's help in finding the status of our employment based adjustment of status (I-485) applications, pending with Nebraska Service Center for over <xyears> years. After waiting for over <xmonths> months, we received a request to submit further evidence on <date> and we promptly responded to this request and sent all the required documents that were received by USCIS on <date>.
It has been <xmonths> months since we responded to the notice for request for further evidence and do not understand why it is taking so long for USCIS to look into our cases. Below given are the details of our case.
Primary Applicant Case Details:
Name: <Name>
Alien: <Alien#>
I-485 Petition Receipt No: <XXXXXXX>
Receipt Date: <date>; Notice Date: <Date>
1st Finger Prints completed: <Date>
Notice for Request for further Evidence Issued: <Date>
Response for Notice for Request for further Evidence received by USCIS: <Date>
2nd Finger Prints completed: <Date>
Derived Beneficiary Applicant Case Details:
<details>
Hence we request the help of your office to find out what exactly is going on with our cases and if possible push for a faster adjudication. We would highly appreciate any help that your office can provide in this regard.
Sincerely,
<Principal Applicant Full Name>
<Derived Beneficiary Applicant Name>
Phone: <xxx-xxx-xxxx>
Email: <email>
(wish to thank contributor of these forums for this template)