Comma-separated list of a record's fields to be fetched. Available fields: id, dialogLink, name, chatId, chatName, markedAsSpam, operatorId, operatorName, operatorAssignedAt, previousOperators, firstOperatorName, firstOperatorAssignedAt, previousOperatorsAsString, botName, clientId, clientExternalId, clientIp, userAgent, messengerType, status, startedAt, closedAt, operatorFirstMessageCreatedAt, operatorLastMessageCreatedAt, botLastMessageCreatedAt, lastMessageCreatedAt, clientLastMessageCreatedAt, clientOnlineAt, clientOfflineAt, referer, closeReason, price, messages, messagesAsString, operatorMessageCount, botMessageCount, clientMessageCount, messageCount, dialogResultsFromBot, dialogResultsFromBotJson, dialogResultsFromOperator, nps, csi, csiMax, csiPercent, fcr, whatsappPhone, markers, rating, operatorGroups, closedBy, timerFirstAnswer, timerNextAnswers, operatorFirstAnswer, operatorNextAnswers.