Python how to a creat an except exception or error in python.

import pyttsx3 #pip install pyttsx3
import speech_recognition as sr #pip install speechRecognition
import datetime
import webbrowser
import os
import smtplib

engine = pyttsx3.init('sapi5')
voices = engine.getProperty('voices')
# print(voices[1].id)
engine.setProperty('voice', voices[0].id)


def speak(audio):
    engine.say(audio)
    engine.runAndWait()


def wishMe():
    hour = int(datetime.datetime.now().hour)
    if hour>=0 and hour<12:
        speak("hello!")

    elif hour>=12 and hour<18:
        speak("Good Afternoon!")   

    else:
        speak("i hope you are ok")  


def takeCommand():
    #It takes microphone input from the user and returns string output

    r = sr.Recognizer()
    with sr.Microphone() as source:
        print("Listening...")
        r.pause_threshold = 1
        audio = r.listen(source)

    try:
     
        query = r.recognize_google(audio, language='en-in')
        print("Recognizing...")    
        
        print(f"User said: {query}\n")
       
    except Exception as e:
         print(e)
         print("Unable to Recognize your voice.")
    return query



if __name__ == "__main__":
    wishMe()
    while True:
    # if 1:
        query = takeCommand().lower()

        # Logic for executing tasks based on query
        if 'how are you' in query:
            speak("im ok thank you")
        if 'how was your day' in query:
            speak('my day was ok')
        elif 'what did you eat' in query:
            speak('i ate ramen noodles')
       
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my question is how to create an error or an Exception for (not in query) for example if a question is not in query
speak (sorry i dont know that)

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thank you guys i hope you will understand my question and what iam looking for i will appreciate any help .
than you.

What I have tried:

python iam new in python i didnt try anything since i dont have any idea.
thank you