Mule Code to convert CSV without headers into CVS with headers

Question

I want to convert a CVS which I'm reading from Object Store and while retrieving the value from that Object I'm getting below output, INPUT to Object store:

   %dw 2.0
output application/json
---
{
    "licNo" : attributes.queryParams.LicNo,
    "errMsg" : attributes.queryParams.errMsg
}

Output I'm getting after using RetrieveAll node is below: Output:

    12344,12345,12346
Server Error,Mule Error,Server Error

But the output I want is given below:

Licence No.,Error Message
12345,Mule Error
10234, Error
12045,Server Error
12305,Mule Error

I have deployment in few days, please someone help me. TIA

Thanks and Regards, Kunal Awasthi,