Boeing Co. and its machinists union have been asked to meet in U.S. Senator Patty Murray's office today in a "last-ditch attempt" at reaching an agreement to keep 787 Dreamliner assembly jobs in Washington state. Murray, a Washington Democrat, "believes the union has put a very good offer on the table, and Boeing shouldn't pass up on this opportunity," Alex Glass, a spokeswoman for the senator, said in a telephone interview. Boeing is considering building a new 787 Dreamliner assembly plant in South Carolina in what would be the first time the world's second-biggest commercial-jet builder has set up a new factory outside its historic Seattle manufacturing hub. The company hasn't yet been able to reach the no-strike agreement it's seeking with the union, whose four walkouts in the past 20 years have delayed plane deliveries and cost billions.