What walks away
The obvious loss is the job you never heard about. The quieter loss is the second call they do not make, the review they do not leave, and the habit of trying someone else first. Front desks feel this as a morning backlog. Owners feel it as a slow week they cannot explain.
Different businesses lose different things. A dealership loses a shopper who will buy this weekend. A pediatric office loses a parent who needed to know if they should come in. A landscape crew loses a storm cleanup that went to the company that answered.
How an agent changes the cost
It cannot promise every caller becomes a customer. It can promise the call is picked up, the question you prepared is answered, and the rest is written down for a person. That turns an unknown loss into a list you can work.
Pair it with a fast follow-up. A message taken at 8 p.m. still fails if nobody calls back. Text or email the person who opted in, with the reason and the number, while the caller still remembers you.