Python: Convert JSON data to CSV using pandas library

Below is my JSON data that I am trying to convert into CSV.

{
  "account_number": "xxxx", 
  "actual_reading_current": "14581", 
  "actual_reading_previous": "13925", 
  "address": "asdsa3"
}

My code thus far,

data_file=pd.read_json('E:\\invoice\\output\\response.json')
    data_file.to_csv("try.csv",index=False)

One drawback is that it imports all the columns into csv, however, I want only the 1st and 2nd columns to be imported. Am I missing something here?

new code

data_file=pd.read_json('E:\\invoice\\output\\response.json')
    data_file.to_csv("try.csv",index=False,columns=['account_number'])

in my output its showing multiple time but in my json its only 1 time

enter image description here