When reassuring a target, the Ferry Rats Handbook recommends trying one or more of the following phrases:

"Just pretend I'm not here."
"Sorry, I'm reading something and not really paying attention."
"No worries, please just ignore me entirely."
"I'm just curious about your health bars."
"So, uh, do a lot of murdering lately?"
"Don't be paranoid! I'm not dangerous, I promise!"
"It's fine! It's all totally fine!"
"My drones are harmless, just pretend they're not here!"
"Why not hang out together? Hey, maybe I can help you!"