A dialogue between you and a book seller about buying books

Question: 
Write a dialogue between you and a book seller about buying books.

Myself : Hi

Book seller : Hi, How can I help you?

Myself : I want to buy a  book.

Book Seller : What book do you want to buy?

Myself : I want to buy an ARK English Grammar book.

Book seller : I see. Please wait. 

Myself : Ok.

Book seller : Here it is.

Myself : How much does it cost?

Book seller : It is only 100 taka.

Myself : Really! Here is your money and thank you.

Book seller : you are most welcome.