Q: Can I get you anything? (clerk)

1. I'm not ready yet.
2.
3.

(Is the answer 1 correct? What other answers can we say?)

1 is correct, yes.

Also ...

"I'm just browsing, thanks."
or
"Just looking, thank you."
or
"I'm just waiting for them [gesture at others who are with you], thanks."
or
"Yes, do you have this in a size 8?"
or
"Yes, do you have this in red?"

You can make many more up.

2. No thanks, I'm just looking.

3. Yes, please. I'd like . . .

Yes, the answer "1. I'm not ready yet." is correct if you do not currently need any assistance or have any specific requests. However, there are also other possible answers you can give depending on your preferences or needs. Here are a few examples:

2. "No, thank you. I'm just browsing."
This answer could be appropriate if you are simply looking around without any immediate plans to make a purchase or require assistance.

3. "Yes, I have a question about [insert specific product or service]."
You can use this response if you need help or have a specific inquiry regarding a particular item or service offered by the store.

Ultimately, the best answer for you would depend on your situation and what you actually require or desire.