Question: We are working on project using Google Home. 

Details:

1. We have built certain intents in Dialog Flow. It has certain follow-up questions to get the parameter values, as a multi-turn dialogue. When testing using Dialog Flow, test console, I am asking 

	1. Can you help in booking a table: It prompts back with right question (Where do you want to book a table) as configured in Dialog Flow
	2. Where do you want to book a table : I answer - "Some Restaurant". It prompts back with right question (When do you want to book a table) as configured in Dialog Flow
	3. When do you want to book a table: I answer: "Today" . It prompts back with right question (For how many guests) as configured in Dialog Flow.
	4. For how many guests? - I answer: "4 people." It ends the conversation, as configured in Dialog Flow.

The above conversation works perfectly fine as expected. 

When I test using the integration for Google Home (using simulator with action SDK) [See how it works in Google Assistant]

1. Invoke the app (by using the explicit invocation - Talk to [APP NAME]) - App gets invoked with the right greeting message as configured
2. After that when I ask the questions as mentioned - above - app leaves the conversation? Nothing is answered back.

Not sure why this issue is happening - anything I am missing in the configuration?

Answer: 
In my case, this is due to not accept the new policy on the developer account. After accept, it gets resolved.
Fixed as NitinSingh comment - go to iTunes Connect and accept policy. Strange anyway fixed