How can I write a thesis for an essay on "Hills Like White Elephants"?

In order to
come up with a thesis for Hemingway's "," you first need to determine what the story
is about and what message Hemingway is trying to convey.

The story is about
a couple waiting for a train at a train station. They are talking about the woman's pregnancy.
The man wants her to get an abortion. She does not want to. There are clues this conflict is
putting a great strain on their relationship, and probably reflects strains that were already
there before the pregnancy brought the...