While Consuming SOAP based Web Service Getting Error!!

Hi, I am into 2nd week training of MuleSoft.U Developer Essentials (Feb 10 - April 6, 2016) batch. I am getting error while Consuming the SOAP based web service for getUnitedFlightsFlow. Below is the error.

INFO 2016-02-19 19:38:53,650 [main] org.mule.lifecycle.AbstractLifecycleManager: Initialising model: _muleSystemModel

INFO 2016-02-19 19:38:53,655 [main] org.mule.construct.FlowConstructLifecycleManager: Initialising flow: getDeltaFlightsFlow

INFO 2016-02-19 19:38:53,655 [main] org.mule.exception.DefaultMessagingExceptionStrategy: Initialising exception listener: org.mule.exception.DefaultMessagingExceptionStrategy@7f749872

INFO 2016-02-19 19:38:53,676 [main] org.mule.processor.SedaStageLifecycleManager: Initialising service: getDeltaFlightsFlow.stage1

Retrieving document at 'http://mu.mulesoft-training.com/essentials/delta?wsdl'.

INFO 2016-02-19 19:38:54,717 [main] org.mule.lifecycle.AbstractLifecycleManager: Disposing RegistryBroker

INFO 2016-02-19 19:38:54,720 [main] org.mule.construct.FlowConstructLifecycleManager: Disposing flow: getDeltaFlightsFlow

INFO 2016-02-19 19:38:54,721 [main] org.mule.processor.SedaStageLifecycleManager: Disposing service: getDeltaFlightsFlow.stage1

INFO 2016-02-19 19:38:54,723 [main] org.mule.construct.FlowConstructLifecycleManager: Disposing flow: getUnitedFlightsFlow

ERROR 2016-02-19 19:38:54,723 [main] org.mule.construct.Flow: Failed to stop service: getUnitedFlightsFlow

org.mule.api.lifecycle.LifecycleException: null

at org.mule.lifecycle.AbstractLifecycleManager.invokePhase(AbstractLifecycleManager.java:153) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.construct.FlowConstructLifecycleManager.fireDisposePhase(FlowConstructLifecycleManager.java:144) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.construct.AbstractFlowConstruct.dispose(AbstractFlowConstruct.java:162) ~[mule-core-3.7.3.jar:3.7.3]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_71]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_71]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_71]

at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_71]

at org.mule.lifecycle.phases.DefaultLifecyclePhase.applyLifecycle(DefaultLifecyclePhase.java:237) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.lifecycle.phases.MuleContextDisposePhase.applyLifecycle(MuleContextDisposePhase.java:102) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.config.spring.SpringRegistryLifecycleManager$SpringContextDisposePhase.applyLifecycle(SpringRegistryLifecycleManager.java:141) ~[mule-module-spring-config-3.7.3.jar:3.7.3]

at org.mule.lifecycle.RegistryLifecycleCallback.doApplyLifecycle(RegistryLifecycleCallback.java:91) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.lifecycle.RegistryLifecycleCallback.onTransition(RegistryLifecycleCallback.java:67) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.lifecycle.RegistryLifecycleManager.invokePhase(RegistryLifecycleManager.java:140) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.lifecycle.RegistryLifecycleManager.fireLifecycle(RegistryLifecycleManager.java:111) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.registry.AbstractRegistry.dispose(AbstractRegistry.java:68) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.registry.AbstractRegistryBroker$2.onTransition(AbstractRegistryBroker.java:69) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.registry.AbstractRegistryBroker$2.onTransition(AbstractRegistryBroker.java:64) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.lifecycle.RegistryLifecycleManager.invokePhase(RegistryLifecycleManager.java:140) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.lifecycle.RegistryBrokerLifecycleManager.fireDisposePhase(RegistryBrokerLifecycleManager.java:82) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.registry.AbstractRegistryBroker.dispose(AbstractRegistryBroker.java:63) ~[mule-core-3.7.3.jar:3.7.3]

at org.mule.registry.MuleRegistryHelper.fireLifecycle(MuleRegistryHelper.java:137) ~[mule-core-3.7.3.jar:3.7.3]

Below is my code:-

[37824-snippet-1.txt]

Can you please help me out why I am getting this error?