You can send messages in 1on1 Messenger conversations with a delay (e.g after 15 minutes)
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INSTRUCTIONS:
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1. Open the Messenger page

2. Click on the conversation or create a new conversation with contact.
3. Type in the text of the message
4. Click on the "V" sign in the Send Button and select the Scheduling option: Tomorrow at 9:00AM; Next Monday at 9:00AM; Custom time.

Note:
1. It's not possible to edit the Scheduled message
2. You can view/delete scheduled messages in the Scheduled tab of the Contact panel.

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