Question

un dialogo de tres personas que tenga saludos presentacion y despedida

Answer 1

Chat in facebook.

Mario: Hello Leo
Leo: Hi! Mario, how are you?
Mario: I am fine thanks, and you?
Leo: very well
Mario: it is ok. where are you study?
Leo: I study in the high school, in Florida. and you?
Mario: it is good. I study in the university from Mexico.
Leo. Mexico! is very beautiful. I like it. I want go to mexico the next year
Mario: yes, sure, you are welcom to Mexico. 
Leo: thank you. ok, excuse me I goint to eat now, nice to meet you Mario.
Mario: yes, no problem, bye Leo, see you
Leo:goodbye

Answer 2

un ejemplo podria ser:
maria: hi I am maria, what is your name?
juan: hi maria I am juan and she is my cousin.
sandra: hello maria I am sandra
maria: nice too meet you
sandra:nice too meet you,too
juan: well maria, ana and I have to go, see you later
maria: ok bye guys.