Cancel the leg of █████ ticket from STT to NY on 18th?

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THIS ITINERARY IS A RESERVATION ONLY. This reservation will not be ticketed or price guaranteed until ticketing authorization is received. Please contact your travel office by 11:59 PM on June 28, or this entire reservation will automatically cancel.

Flight Information:
Reserved: LOT -
Class: Economy
Seats: Unassigned
Departs:
Date: Jul 05,2014 Time: 5:35 PM
Arrives: New York JFK, NY - JFK
Date: Jul 05,2014 Time: 9:00 PM

Flight Information:
Reserved: AMERICAN AIRLINES
Class: Economy
Seats: Unassigned
Departs: New York JFK, NY - JFK
Date: Jul 06,2014 Time: 2:30 PM
Arrives: Miami Interntnl, FL - MIA
Date: Jul 06,2014 Time: 6:00 PM

Flight Information:
Reserved: AMERICAN AIRLINES MI
Class: Economy
Seats: Unassigned
Departs: Miami Interntnl, FL - MIA
Date: Jul 06,2014 Time: 7:10 PM
Arrives: St Thomas, VIRGIN ISLANDS - STT
Date: Jul 06,2014 Time: 9:45 PM

Flight Information:
Reserved: AMERICAN AIRLINESIM
Class: Economy
Seats: Unassigned
Departs: St Thomas, VIRGIN ISLANDS - STT
Date: Jul 18,2014 Time: 1:35 PM
Arrives: New York JFK, NY - JFK
Date: Jul 18,2014 Time: 6:00 PM

Flight Information:
Reserved:
Class: Economy
Seats: Unassigned
Departs: New York JFK, NY - JFK
Date: Jul 18,2014 Time: 10:50 PM
Arrives:
Date: Jul 19,2014 Time: 12:55 PM

Thank you for choosing American Express Centurion Travel Service and have a pleasant trip.

We will need to cancel the portion of the ticket from STT to NY if he is not going to take it...otherwise, it is possible they cancel her ticket on to: ...do you wish me to cancel the STT to NY leg of the ticket on July 18th?