import (
        "fmt"

        "github.com/marcossegovia/apiai-go"
)

func main() {
    client, err := apiai.NewClient(
        &apiai.ClientConfig{
            Token:      "YOUR-API-AI-TOKEN",
            QueryLang:  "en",    //Default en
            SpeechLang: "en-US", //Default en-US
        },
    )
    if err != nil {
        fmt.Printf("%v", err)
    }
    //Set the query string and your current user identifier.
    qr, err := client.Query(apiai.Query{Query: []string{"My name is Marcos and I live in Barcelona"}, SessionId: "123454321"})
    if err != nil {
        fmt.Printf("%v", err)
    }
    fmt.Printf("%v", qr.Result.Fulfillment.Speech)
}