Seriously, you do.
I had the fortune of dealing with a granny yesterday on the phone. She was supposed to have called me a week ago with a quoteÂ but she never did. When I asked her why, her reply was that “One of my ladies had called her and gotten the price from her”… Um, no. I don’t have any “ladies” that would have called her… She’s just plain lying! But you can’t call someone’s granny a liar so you just nod and say “Okay, I’ll ask around and find out who called you, but in the mean time can I get those prices…”.