I need help with what key terms to write on finding three cases that support this hypothetical case example:

Thomas advertises in the paper that he will pay $1,000 to anyone giving him information as to the whereabouts of a man named Jeffery. Andrew sees a copy, in Spanish, and sends Thomas the information. Does Andrew get the reward?

it would be great if you guys can actually list a few cases that I can just search up, I've been trying a bunch of key terms for the last hour not sure how to find relevant cases.