```cpp
#include <LiquidCrystal.h>

// Pin configuration for the MQ-2 smoke sensor
const int mq2Pin = A0; // Analog pin for MQ-2 sensor

// Pin configuration for the Flame sensor
const int flamePin = 2; // Digital pin for Flame sensor

// Pin configuration for the LCD
LiquidCrystal lcd(8, 9, 4, 5, 6, 7); // RS, EN, D4, D5, D6, D7

// Pin for the speaker or piezo element
const int speakerPin = 10; // Connect the speaker or piezo to digital pin 10

// Threshold values
const int smokeThreshold = 300;
const int flameThreshold = LOW;

void setup() {
  // Initialize the LCD
  lcd.begin(16, 2);

  // Initialize the MQ-2 sensor pin
  pinMode(mq2Pin, INPUT);

  // Initialize the Flame sensor pin
  pinMode(flamePin, INPUT);

  // Set up the speaker pin
  pinMode(speakerPin, OUTPUT);

  // Set up the initial display message
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Fire Detection" , );
}

void loop() {
  // Read the value from the MQ-2 smoke sensor
  int smokeValue = analogRead(mq2Pin);

  // Read the value from the Flame sensor
  int flameValue = digitalRead(flamePin);

  // Check if the smoke or flame sensor readings are above the threshold
  if (smokeValue > smokeThreshold || flameValue == flameThreshold) {
    // Clear the LCD and print the "Fire detected" message
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Fire detected");

    // Generate a tone to create a sound
    tone(speakerPin, 1000); // You can adjust the frequency as needed
    
    // You can add additional actions here, like sending a notification.
  } else {
    // Clear the LCD and display a standby message
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Standby");
    
    // Turn off the tone
    noTone(speakerPin);
  }

  // Delay for a moment to avoid rapid display updates
  delay(1000);
}
```