The correct answer to this open question is the following.
Although there is no particular reference of context, we can comment on the following.
If a conversation transitions from a frozen to a casual one, we must respectfully deliver the message so we can create this space of trust or this bond of trust.
Although the conversation is casual, it does not mean you have to change the good speaking forms of having a conversation. openness, respect, the ability to listen carefully, and paying attention will always be positive characteristics when having conversations with other people. No matter how casual it is.