WhatsApp Demo Creation with Make.com & OpenAI

I need a developer to create a simple WhatsApp demo using Make.com and OpenAI.

This is a basic demo: no Google Calendar, no email sending, no databases.
Everything happens inside WhatsApp only.

The assistant must have a natural, human-like conversation, collect user details, and simulate the booking process.


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GOAL OF THE DEMO

The demo must allow the following:

1. A user sends a message to a WhatsApp Business number.


2. The message is received inside Make.com via webhook.


3. Make.com sends the message to OpenAI using a system prompt that I will provide.


4. OpenAI generates a natural conversational reply.


5. The assistant asks the user for:

preferred day

preferred time (morning or afternoon)

full name

email address



6. After collecting all data, the assistant must say:
"Perfect, you will receive your appointment summary at this email."


7. The demo stops there.


8. No real email must be sent.


9. No Google Calendar integration.


10. Conversation resets after completion.



This is a conversation-only demo.


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TOOLS REQUIRED

1. Make.com


2. Gupshup or 360Dialog for WhatsApp Business API


3. OpenAI API (Chat Completion)



No additional tools needed.


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TECHNICAL REQUIREMENTS

1. Set up a working WhatsApp Business API connection (Gupshup or 360Dialog).


2. Connect the incoming webhook to Make.com.


3. Build a Make.com scenario that:

receives the WhatsApp message

sends it to OpenAI with the provided prompt

returns the AI response to WhatsApp



4. Manage a simple conversation flow inside Make.com:

greeting

asking for day

asking for time

asking for full name

asking for email

simulated confirmation



5. There must be a natural line when the assistant is "checking availability", for example:
"Let me check that for you."


6. After the user provides all information, the scenario ends and resets.




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DELIVERABLES

1. A fully working WhatsApp demo number connected to Make.com.


2. A Make.com scenario that performs the entire conversational flow.


3. Documentation on how to modify the prompt or adjust the conversation.




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WHAT I PROVIDE

1. The complete system prompt for the assistant.


2. The conversation script to follow.


3. Access to WhatsApp API provider.


4. Make.com access.




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REQUIRED SKILLS

1. Experience with Make.com


2. Experience with WhatsApp Business API (Gupshup or 360Dialog)


3. Experience integrating OpenAI API


4. Ability to deliver clean and stable workflow

Just to be clear, this is a Demo with max 4 h of setup with no mail sending and no calendar. It's based on no code platforms, avoid any offer above 100 usd for the Demo. It's one Demo, 1 number.