Expense note/refund for turnover in customer list?

Hello! I am a journalist who writes articles for a company. Sometimes I also have to review restaurants, so I go out to dinner somewhere on behalf of that company. I have to pay the bill for myself and my companions on the spot. Afterwards, I am reimbursed for half (= ‘my share’) of the restaurant bill. So I send that company an expense claim for half of the amounts on the bill.

Now I am wondering whether this refund of half of my restaurant costs is considered ‘turnover’ and whether I should add that money to the amount on the customer list.