Inbox Send Button:
- Current behavior: For Airbnb guest, the send button is only available once a message is received from the guest or if the host sends a direct message from Airbnb to the guest.

=> I want this button should always available after guest booked, no matter if the guest or I sent anything yet. So when a guest on Airbnb does an instant book, I don't have to leave Hostfully to reply.