that's true, isn't it

I answer that it is true.

私は「本当ですね」と答えます

I hear my coworker say it is hot and answer that it is true.

私は暑いという同僚の話を聞いて「本当ですね」と答えます

I hear my coworker say it is hot and answer at midday that it is true.

私は暑いという同僚の話を聞いて昼に「本当ですね」と答えます

I hear my coworker say it is hot and answer in the office at midday that it is true.

私は暑いという同僚の話を聞いて昼に事務所で「本当ですね」と答えます

I hear my coworker say it is hot and answer in the office at midday, nodding, that it is true.

私は暑いという同僚の話を聞いて昼に事務所でうなずきながら「本当ですね」と答えます