Sentence 1 because it is missing a comma after "but"
I’m not sure if you meant “convince” and I don’t know the options giving but you can use words like persuade or prove or etc.
<span>This is an example of a simple dialogue. It
is basically just an exchange, discussion or conversation between two or more
people. It is punctuated by “quotation marks” and it is a literary device used
in movies, books, films etc. </span>
