import random

def get_computer_choice():
    choices = ["rock", "paper", "scissors"]
    return random.choice(choices)

def get_user_choice():
    user_choice = input("Enter your choice (rock, paper, scissors): ").lower()
    while user_choice not in ["rock", "paper", "scissors"]:
        print("Invalid choice. Please try again.")
        user_choice = input("Enter your choice: ").lower()
    return user_choice

def determine_winner(user, computer):
    if user == computer:
        return "It's a tie!"
    elif (user == "rock" and computer == "scissors") or \
         (user == "scissors" and computer == "paper") or \
         (user == "paper" and computer == "rock"):
        return "You win!"
    else:
        return "You lose!"

def play_game():
    print("Welcome to Rock, Paper, Scissors!")
    while True:
        user_choice = get_user_choice()
        computer_choice = get_computer_choice()
        print(f"\nYou chose: {user_choice}")
        print(f"Computer chose: {computer_choice}")
        result = determine_winner(user_choice, computer_choice)
        print(result)
        
        play_again = input("\nDo you want to play again? (yes/no): ").lower()
        if play_again != "yes":
            print("Thanks for playing! Goodbye!")
            break

# Run the game
play_game()