When someone says "see you," the most common and appropriate response is to reciprocate the sentiment. Here are some polite ways to respond:
- "See you too!"
- "Sure, see you!"
- "Okay, see you later!"
- "Alright, see you then!"
- "Sounds good, see you soon!"
- "Thanks, see you next time!"
- "Sure thing, see you around!"
These responses acknowledge the other person's intention to meet again and reflect a positive attitude towards seeing them in the future. Keep in mind that the specific response may vary depending on your relationship with the person and the context of the conversation. But in general, any friendly and casual response is appropriate.