Python-3.x if / elif中的语音操作

import speech_recognition as sr

def recognize_speech():
    r = sr.Recognizer()
    with sr.Microphone() as source:
        print("Say something!")
        audio = r.listen(source)
    
    try:
        text = r.recognize_google(audio)
        print(f"You said: {text}")
        
        if "hello" in text.lower():
            print("Hello there!")
        elif "bye" in text.lower():
            print("Goodbye!")
        else:
            print("I didn't understand that.")
    except sr.UnknownValueError:
        print("Sorry, I couldn't understand what you said.")
    except sr.RequestError as e:
        print(f"Could not request results from Google Speech Recognition service; {e}")

recognize_speech()