Yes! If you're looking to message a Host for the first time to ask a question, you can do so by clicking the"Contact Host” button on the Host's property page, which is located under the property map. From there, ask anything you like!
Once the Host writes you back, you'll receive a notification and you can access the message by clicking the text bubble at the bottom of your screen while in the app.
Clicking the text bubble will take you to your Inbox where you can continue to communicate with the Hosts you've been communicating with.