You can run a test on Alexa Developer Console or open your Alexa APP to interact with the mobile. You could also test on echo, if you have the physical device.
Click on Test tab
Make sure test is enabled.
Open Personal Banker (your invocation name) to start the conversation
What is my saving account balance? to see the result
What is my account balance? to see the result
Feel free to continue to explore other utterances.
Download the Alexa app and sign in using your developer account.
Click on the tab button in the upper-left and choose Skills & Games to check your developed skill
Click the center button to start utterance test. Invoke the skill by saying your invocation name, say “open personal bank”
The alexa app should be invoked and respond back.