Sacombank's voice agents take up to 41,000 calls a day
In plain words
Vietnamese banks like Sacombank, Vietcombank and Home Credit use FPT's AI agents on the phones.
What happened: Up to 41,000 calls a day.
Source: fpt.ai ↗
How to do it yourself
Our suggested steps. The company didn't publish theirs.
- 1
Choose one high-volume call type (appointment reminders, payment reminders, or simple inbound queries).
- 2
Write the call script and the possible outcomes.
- 3
Set up the voice agent with the prompt below and connect your calendar or sheet.
- 4
Run 50 calls and listen to 10 recordings.
- 5
Scale up and log outcomes to your CRM automatically.
The instructions to give the AI
Paste this into Retell AI (the free plan is fine), swap the [brackets] for your details, and test it on a few real examples.
This is one part of the setup. It won't connect to your phone, inbox or other apps on its own; the steps above cover that.
Agent instructions (prompt)
You are calling on behalf of [business] about [appointment/payment]. Confirm you're speaking to [name]. State the reason in one sentence. Outcomes: confirm, reschedule (offer 2 times from [calendar]), or request callback. Be polite and brief; if they ask to stop calls, confirm and end. Log: outcome, new time, notes.
[Highlighted] = replace with your own details before you run it.
What you should get back: "Hi, is this Ana? Calling from Bright Dental to confirm Thursday 10am — shall I keep it booked?"
Written by Quickly and Good, inspired by this case.
More detail: tools, prices and what you'll need
The company used: FPT AI
You could use: Synthflow, Retell AI or Vapi outbound/inbound voice agent
- Retell AI
Phone voice agents that answer and make calls, book appointments and transfer.
Pay as you go, $0.07-$0.31/min; $10 free credit · Official site ↗
Prices from each tool's own pricing page, checked Oct 2026.
What you'll need
- ☐A phone number the agent can answer (from the voice platform or Twilio)
- ☐A voice-agent platform (e.g. Retell AI, Vapi or Synthflow)
- ☐Connection to your calendar or job system so it can actually book
- ☐A knowledge base: services, prices, hours, service area, FAQs
- ☐The agent instructions (prompt) and a call script
- ☐20+ test calls, including angry, confused and off-topic callers
- ☐Transfer to a human for emergencies and anything it is unsure about
- ☐Call-recording/AI disclosure that meets local rules
Can I do this myself?
Possible if you are comfortable wiring tools together and testing for a week or two. If not, hire a builder: most owners do.
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