def hiMom():
    prompt = "How many days should pass before I come home? Type a number (large, small, or even negative!) and press enter. "
    numDays = input(prompt)
    numDays = int(numDays)
    if numDays == 0:
        print('Good answer!')
    elif numDays > 0:
        if numDays > 31:
            print("Wow, that's a long time from now!")
        elif numDays <= 5:
            print("That's coming right up, but I'll see what's available.")
        else:
            print("Okay, I will look into flights around then.")
    elif numDays < 0:
        print("Still working on that time travel machine...")
    askAgain()

def askAgain():
    prompt = "Do you want to try asking again? Type yes or no and press enter. "
    yesOrNo = input(prompt)
    yesOrNo = str(yesOrNo)
    if yesOrNo == 'yes':
        hiMom()
    elif yesOrNo == 'no':
        print("All right, I'll chat with you later. Bye for now!")
    else:
        print("I'm not sure what that means.")
        askAgain()

hiMom()