BRIEF-Canada wants U.S. to agree to extend existing ban on non-essential travel until June 21 - Canadian government sources

* CANADA WANTS U.S. TO AGREE TO EXTEND EXISTING BAN ON NON-ESSENTIAL TRAVEL UNTIL JUNE 21 - TWO CANADIAN GOVERNMENT SOURCES

* "IT'S TOO EARLY TO LIFT THE RESTRICTIONS", SAYS CANADIAN GOVERNMENT SOURCE * CANADA'S DISCUSSIONS WITH UNITED STATES ABOUT EXTENDING BAN ON NON-ESSENTIAL TRAVEL HAVE BEEN POSITIVE - CANADIAN GOVERNMENT SOURCE Source text for Eikon: Further company coverage: [ ]