How to Write an AI Sales Agent Prompt That Sounds Like Your Best Rep

DialSwarm team · October 17, 2026 · 5 min read

A prompt is a job description

If you have ever onboarded a new SDR, you already know how to write an AI sales agent prompt. You tell them who they work for, who they are calling, what to find out, when to hand off, and what never to do. A prompt is that same briefing, written down clearly enough that it works on every call.

The best prompts are written by the rep whose leads the agent is calling. That rep knows what a good first call sounds like. In effect, they are training an AI version of themselves to handle the tedious part, so they can spend their time on the conversations that need them.

The seven parts of a good sales agent prompt

1. Role and company. Who the agent is calling for, in one or two sentences. "You are an assistant calling on behalf of Lakeside Insurance, an independent agency in Ohio."

2. Honesty rules. Non-negotiable lines. The agent never claims to be human, says it's an AI when asked. It never claims to be human. It honors any request to stop calling. It does not make promises the team has not approved. DialSwarm agents never claim to be human and say they're an AI when asked, and your prompt should reinforce it rather than work against it.

3. Context about the lead. What the person did and when. "The person requested an auto insurance quote on our website today." Pass this in from your form or lead list so the agent can mention it naturally.

4. Goal of the call. One clear goal. "Find out whether they want to talk with a licensed agent now, and if so, transfer them." Not five goals.

5. Qualifying questions. Three or four, in order, with a note on what each is for. Short questions get honest answers.

6. Transfer and booking rules. When to warm transfer, when to book a callback, when to end politely. Include "always transfer or book if the person asks for a human."

7. Tone and boundaries. How to sound and what is off limits. "Friendly, brief, plain language. Do not give coverage advice or quote prices. If asked, say a licensed agent will cover that."

A complete example

Here is an example prompt for a home services company. Adapt it, do not copy it word for word.

You are an assistant calling on behalf of Riverside Plumbing, a family-owned plumbing company serving the north suburbs.

Rules: Introduce yourself as an assistant calling for Riverside Plumbing. Never claim to be a person. If the person asks you to stop calling, apologize, confirm you will not call again, and end the call. Do not quote prices or promise arrival times.

Context: The person requested an estimate on our website for {request}. They agreed to receive calls about their request.

Goal: Find out whether they would like to book an estimate visit, and transfer ready customers to the office.

Ask, in order: 1. Is now a good time for two quick questions? 2. Can you tell me a bit about what is going on with {request}? 3. Is this urgent, like an active leak, or can it be scheduled? 4. What days work best for a visit?

Transfer to the office if they want to book now, if it is urgent, or if they ask for a person. If nobody is available, offer a callback time. If they are not interested, thank them and end the call.

Tone: warm, brief, plain words. Keep each answer to one or two sentences.

Notice how much is left out. No company history, no sales pitch, no long list of services. The agent can learn general business information from your website. The prompt focuses on the call.

Common prompt mistakes

Too many questions. Ten questions turn a quick call into an interrogation. Keep it to what you need for a transfer decision.

Vague goals. "Have a great conversation and build rapport" gives the agent nothing to aim at.

No transfer rule. Without one, the agent either transfers everyone or no one.

Asking for things it should not do. Pricing, legal or medical advice, guarantees. Name these as off limits.

Instructions that conflict with honesty. Never instruct an agent to sound human, avoid saying it is AI, or get past screening. Besides being wrong, the FCC confirmed in February 2024 that AI-generated voices are artificial voices under the TCPA, so calls using them require prior express consent (FCC Declaratory Ruling FCC-24-17, accessed Oct 17, 2026).

Questions that touch protected areas. In hiring, housing, health, and credit contexts, some questions are restricted. Have the right person review your questions.

Jargon. Write the way your customers talk.

Testing and improving the prompt

A prompt is never done on the first draft.

1. Read it out loud. Anything that sounds stiff will sound stiff on the call.
2. Call yourself. Play a ready lead, a busy lead, a confused lead, and someone who says stop.
3. Listen live. DialSwarm lets reps listen in on calls and coach the agent mid call by typing or talking. When you correct the same thing twice, update the prompt.
4. Review call history weekly. Look for calls that ended early, transfers that happened too soon or too late, and questions people misunderstood.
5. Change one thing at a time, so you know what helped.

If a rep wants the agent to sound like them, DialSwarm can copy their voice with their spoken consent and admin approval. The agent still never claims to be human. Most teams get the prompt right before thinking about voice.

DialSwarm bills connected calls only, so unanswered dials don't count. You get 10 free calls with no card, and current plans are on the pricing page. The free calls are enough to test a first prompt on yourself and a few real leads.

A one-page prompt checklist

• Role and company in one or two sentences.
• Honesty rules, including AI disclosure and stop requests.
• Lead context passed in from your data.
• One goal.
• Three or four questions.
• Clear transfer, booking, and end rules.
• Tone and off-limits topics.
• Tested on yourself before real leads.

Questions