def request = '''<soapenv:Envelope xmlns:soapenv="http://s...content-available-to-author-only...p.org/soap/envelope/" xmlns="http://w...content-available-to-author-only...d.com/merch/services">
<soapenv:Header/>
<soapenv:Body>
<MerchOfferRequest TransactionIdentifier="55678" TransactionLog="true">
<RequestCriterion>
<OriginDestinationOptions Id="OD1">
<FlightSegment ActiveInd="Y" Id="1">
<DepartureAirport LocationCode="IAH"/>
<ArrivalAirport LocationCode="DEN"/>
<DepartureDateTime>dfdf</DepartureDateTime>
<ArrivalDateTime>2020-12-01T19:00:00</ArrivalDateTime>
<FlightNumber>863</FlightNumber>
<OperatingAirline>UA</OperatingAirline>
<MarketingAirline>UA</MarketingAirline>
<SegmentNumber>1</SegmentNumber>
<ClassOfService>Y</ClassOfService>
<TripIndicator>C</TripIndicator>
<SegmentStatus>HK</SegmentStatus>
<IsSeatMapPricing>false</IsSeatMapPricing>
</FlightSegment>
</OriginDestinationOptions>
<TravelerInfo>
<Traveler HostIndex="1.1">
<Id>1</Id>
<GivenName>THREESILVER</GivenName>
<Surname>TESTER</Surname>
<PassengerTypeCode>ADT</PassengerTypeCode>
<!--<TravelerCategory>MET</TravelerCategory>-->
<Gender>Unknown</Gender>
<TicketingDate>2020-03-25T00:00:00</TicketingDate>
<TicketNumber/>
</Traveler>
</TravelerInfo>
<IncludeExcludeOffers>
<ServiceFilterCode ServiceCode="BAG" ResultAction="Include"/>
</IncludeExcludeOffers>
<!--<BookingReferenceIds BookingReferenceId="CDBZ7L"/>-->
</RequestCriterion>
<Requestor ChannelId="101" CurrencyCode="" ChannelName="OBE" CountryCode="US" TicketingCountryCode="US"/>
</MerchOfferRequest>
</soapenv:Body>
</soapenv:Envelope>'''
 
println new XmlSlurper().parseText(request).'**'.find {it.name() == 'DepartureDateTime'}.text()

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