Dialogue on Mobile phone

Dialogue  merits and demerits of using mobile phone
Myself:- Hello, Rafi how are you?
Rafi:-I am fine and you? 
Myself:- You look very happy today. What’s the reason?
Rafi:- Actually  my father bought me a mobile phone yesterday.
Myself:- Wow, its really nice. But do you know about the merits and  demerits of using mobile phone .?
Rafi:-Yes, At present mobile phone is a very essential device for communication. We can talk to any person of any place of the world within a minute through a mobile phone.
Myself:-Yes, You are right, Mobile phone has become a daily companion of our life.
Rafi:- We can also take photos, videos and enjoy music from a mobile phone.
Myself:- But there are some demerits of using mobile phone. It is very harmful for the students.
Rafi:-yes, you are right. Students spend their valuable time using facebook, internet etc  by mobile phone.
Myself:- Some people also commit crime using mobile phone.
Rafi :- Above all mobile phone has both merits and demerits. So we all should be careful using mobile phone.
Myself:- Thanks a lot. See you again.
Rafi:- Thank you too. See you again.