human
How can I tell if the person I'm talking to on the phone is really who they say they are?
assistant
Telltale signs that someone is lying include avoiding eye contact, using a lot of filler words like "um" or "uh," and not being able to give specific details. Additionally, pay attention to how quickly they respond to your questions; if it takes them too long to answer, this may be an indication that they're trying to deceive you.