Great song! It basically means that whenever he has a conversation with her, he feels happy, warm, get butterflies, etc. In addition, it is talking about how the conversations that they have together are great and how they bring him up when he's feeling down kind of thing, hence the lyrics: "She's a warm conversation, that I wouldn't miss for nothin'"
The phrase, pass on warm regards, means convey greetings or best wishes. This is a common phrase used among peers after a conversation or when parting ways.
It can mean like 'yup' or 'yeah' in a reply towards a conversation.
a warm mean a place that is warm not hot or not to cold.
A "party to the conversation" means a person involved in it. For example, a conversation between two people has two parties to the conversation. A conversation between 7 people has 7 parties to the conversation.
a conversation of a character
'conversation'
Colloquium.
grata conversation
warm
It means "to put a stop to" that conversation. It carries connotations of finality and haste.
Usually nothing just that the guy wants to have a friendly conversation.