Return a specific field

Suppose I have 3 fields with srcip,dstip and name.
And I search with search function from opensearcthpy and it work fine.
But I want to return only name field. How can I implement the given query?

The query DSL just like:

GET /_search
{
  "_source": [ "name" ],
  "query": {
    "match": {
      "name": "test"
    }
  }
}
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