Amazon Connect supports adjustable timeouts for Amazon Lex chatbots
Starting today, contact center admins can improve their Amazon Lex chatbots by configuring timeouts for each customer response in a conversation. The timeout determines how long the chatbot waits for the customer to finish speaking. For example, you might configure a short timeout for a yes/no question, but a longer timeout when asking for an address or credit card number, to give the customer more time to finish speaking.
Source:: Amazon AWS