A caller heard something odd

It says it is an AI. Every call opens by telling the caller they are speaking with an AI. That is by design and cannot be turned off.
An automated message and no conversation. Answering is paused, or you are on Free, which takes messages and callback requests with no live transfer.
"Press 1 to accept" or an announcement before the receptionist. Your phone system is playing it. For example Grasshopper has options that announce a call or ask for the caller's name before connecting. Choose the option that connects immediately.
Your voicemail greeting. Your carrier's voicemail answered before forwarding. Tell us; we look at it with you.
Your business name sounds wrong. On Starter and up you can enter how the voice should say your business name, and a separate after-hours opening line.
Busy signal or the call rings forever. Two forwarding rules may be pointing at each other. Check you did not forward the Call Kettle number back to your line.
Silence or a dropped call. Tell us the time and the number that called, and we look at it.