If you want to say hello to someone in Spanish, here are some simple phrases you can use:

1. Hola - This means "Hello."

2. Buenos días - This means "Good morning."

3. Buenas tardes - This means "Good afternoon."

4. Buenas noches - This means "Good evening" or "Good night."

If you want to ask how someone is doing, you can say:

1. ¿Cómo estás? - This means "How are you?" (for friends or people you know well).

2. ¿Cómo está usted? - This means "How are you?" (for someone you want to be polite to).

3. ¿Qué tal? - This means "How’s it going?"

When someone greets you, you can reply with:

• Estoy bien, gracias. - This means "I’m good, thank you."

• Más o menos. - This means "So-so."

• ¿Y tú? - This means "And you?" (when talking to friends).

• ¿Y usted? - This means "And you?" (when being more polite).

Try practicing by writing out conversations using these phrases!