Aug. 14 (UPI) -- Air Canada has canceled most of its flights over the next few days to prepare for a strike by flight attendants.

It issued a 72-hour lockout notice ahead of the strike by the Canadian Union of Public Employees, which represents 10,000 flight attendants.

"To provide customers certainty, Air Canada will begin a phased wind down of most of its operations to be completed over the next three days," the airline said in a statement. "The airline has also sought government-directed arbitration to resolve the situation."

The airline warned that some customers could be stranded.

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