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I personally saw the meaning behind the two of them meeting was, that now they both had someone. We see earlier in the movie that Ezra is alone, he seems interested in the waitress, but can't bring himself to ask her out. "Ben" criticizes him on the phone(when he is trying to get him angry), that he has no one. When "Ben" dies, he leaves Emily alone again. She obviously has not had any type of relationship(before Ben), since she comments in the field that she hadn't felt a certain way in a long time.
I assume Ben sets it up somehow, or Emily takes it upon herself to meet Ezra. Either way it is done to give the viewer a sense that both people now have the opportunity to start a new life, and relationship.