Case Insensitive search for all the fields

Please suggest me ,search is not working because its case sensitive,how can I implement case Insensitive and I have to perform search on all the fields

Welcome!

Could you provide a full recreation script as described in About the Elasticsearch category. It will help to better understand what you are doing. Please, try to keep the example as simple as possible.

A full reproduction script will help readers to understand, reproduce and if needed fix your problem. It will also most likely help to get a faster answer.