Tosefta על ברכות 5:1

We do not stand up to pray [Shmoneh Esreh directly after], a regular conversation, or after laughter or after idle actions or after frivolous behavior, bur rather [only] after words of wisdom. And also a person should not leave his friend [directly] after a regular conversation, or after laughter, or after idle actions, or after frivolous behavior, but rather [only] after words of wisdom. Because that is what we find the early prophets did, that they finished their words with the words of praise and consolation.