Componente chat.js

chat.js

import React from "react";
import { GiftedChat } from "react-native-gifted-chat";
import { Dialogflow_V2 } from "react-native-dialogflow"
import Voice from 'react-native-voice';
//Importando configurações
import {
    private_key,
    client_email
} from '../../app.json';

export default class Chat extends React.Component {

  state = {
    messages: []
  };

  componentDidMount() {
    this.setState({
      messages: [
        {
          _id: 1,
          text: "Olá! Como posso ajudar?",
          createdAt: new Date(),
          user: {
            _id: 2,
            name: "React Native",
            avatar: "https://placeimg.com/140/140/any"
          }
        }
      ]
    });
    Dialogflow_V2.setConfiguration(
      client_email,
      private_key,
      Dialogflow_V2.LANG_PORTUGUESE_BRAZIL,
      'assistenteredacao'
    );
    Dialogflow_V2.startListening(result=>{
        console.log(result);
    }, error=>{
        console.log(error);
    });
  }

  onSend(messages = []) {
    this.setState(previousState => ({
      messages: GiftedChat.append(previousState.messages, messages),
    }))
    messages.forEach(message => {  
      console.log(message.text);
      Dialogflow_V2.requestQuery(
        message.text, 
        result=>{
          console.log(result)
          messages = [
            {
              _id: result.responseId,
              text: result.queryResult.fulfillmentText,
              createdAt: new Date(),
              user: {
                _id: 2,
                name: "Bot",
                avatar: "https://placeimg.com/140/140/any"
              }
            }
          ]
          this.setState(previousState => ({
            messages: GiftedChat.append(previousState.messages, messages),
          }))
        }, 
        error=>console.log(error)
      );
    });
        
  }

  render() {
    return <GiftedChat
      messages={this.state.messages}
      onSend={messages => this.onSend(messages)}
      placeholder="Digite aqui..."
      locale="pt-BR"
      user={{
        _id: 1,
      }}
    />;
  }
}