Du Lịch App privacy notice
Du Lịch App is the chat inbox Under2 operates at chat.dulich.app for travel companies that use our systems. This page covers the messages you send to those companies through it.
Who is responsible
When you write to a travel company through the chat box on its website, or through WhatsApp, Messenger or Instagram, the message arrives in Du Lịch App. The travel company you are talking to decides how your conversation is used and is the controller of that data. Under2 Company Limited, registered in Hanoi under business registration 0107665342 issued on 14/12/2016, runs the platform on the company's instructions as a processor, and answers every request made under this page.
This notice sits alongside the travel company's own privacy policy. Where the two differ, the company's policy describes what it does with your booking; this page describes what happens inside the chat inbox.
What the inbox receives
| Item | Comes from | Why it is needed |
|---|---|---|
| WhatsApp phone number | To reply to you on WhatsApp | |
| Messenger or Instagram account ID | Meta | To reply to you on that channel |
| Profile name | WhatsApp, Messenger, Instagram | So a reply can address you |
| Messages, photos and files you send | You | To answer what you asked |
| Delivery and read status of replies | WhatsApp, Messenger, Instagram | To know whether a reply reached you |
| Name, phone or email typed into website chat | You | To continue the conversation on another channel if you ask |
Nothing else is taken from your WhatsApp, Facebook or Instagram account: no contacts, no posts, no location and no advertising data.
How it is used
- To answer the conversation you started — an enquiry, a booking or a support question.
- To carry on over WhatsApp when you left your number in the website chat and the company follows up there. Follow-up messages outside the 24-hour reply window use templates approved by WhatsApp.
- Where the travel company has switched it on, an automated assistant answers common questions from that company's published information and hands the conversation to a person when it cannot help.
Your messages are not used for advertising, are not used to build a profile of you, and are not sold, rented or traded to anyone.
Who else handles it
- Meta, which carries messages between you and the travel company on WhatsApp, Messenger and Instagram under its own terms.
- The hosting provider that rents us the server the inbox runs on.
- Lark, our internal workspace, where enquiries and the assistant's unanswered questions are recorded for staff.
- Anthropic, the provider of the AI model behind the automated assistant — only for companies that have switched the assistant on, and only the text it needs to answer.
None of them is given your messages to use for a purpose of its own.
How long it is kept
Conversations are kept for up to 36 months after the last message, then deleted. Travel plans often resume after a season, and the earlier conversation saves repeating it. You can ask for deletion sooner at any time.
Deleting your data
How to ask, what is removed and how fast is on the data deletion page. There is no fee and no reason needed.
Changes
This notice takes effect on 19 October 2026. If it changes materially we will publish the new version here with a new effective date.
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