I am trying to integrate
INSendMessageIntent - to send message from Siri through my app.
INSendPaymentIntent - for making a payment
Make payment using MyWorld
Send message using MyWorld
I think you should be able to support more than one function of Siri by creating independent targets. The payments UI is one IntentsUI target, and the messages UI is another one. Info plists for each define which target looks after which type of intent.