The girl said she was fishing, which proves that she is not very busy now. She can have a pleasant chat with her or tease her appropriately, for example:

1. It seems that we are not busy today. Would you like to fish together?

2. Don't be caught by the boss when fishing ~

3. Don't fish for too long, or you will get fat like me ~

4. Don't forget your dreams when fishing ~

5. Don't be bitten by a fish when you touch it ~

In short, you can choose the appropriate reply method according to the specific situation to make the chat more natural and pleasant.