The dialogue is of the "outer dialogue" type and presents a formal language.
Explanation:
as we already know, dialogue is generally a conversation between two or more individuals, where everyone interacts within the same subject. However, the dialogue can also be done with a single individual who speaks to himself through his own thoughts. In the case of the dialogue presented in the question above, even if we have not been introduced to two individuals, we can consider it as an "outer dialogue" which is what the dialogues composed of a simple conversation between a person's friends are called. We can also see that the author uses a formal language, because those involved in the dialogue are talking about something commercial and that requires this type of language.
