My AI Assistant Is a Time Traveler

Good news, time travel. Bad news: He became an AI assistant. Even worse news: His "owner" is Tang Xiaowei, a female college student who lost her job right after graduation and has less than three digits in savings. The worst news: every time he thinks about it, it costs Tang Xiaowei's money. "Write a resume?" "Eight hundred dollars." "Check information?" "Three hundred and five." "Can you spare some?" "I'm trying... But thinking is really expensive."