I've been attempting to create a two-way conversation using SMS forwarding in Twilio Studio flow. I know there are multiple ways to set up SMS forwarding in Twilio, and I have been successful in doing so using functions on their own, TwiML and Studio Flow SMS on the send message widget. However, I am struggling with creating a flow that extends beyond one message. I've added the function for SMS forwarding into my flow, but every time a response is received it displays as "undefined:undefined" as opposed to "+15555555555:Hello SMS", Am i missing something?