guest; visitor
customer; client; shopper; spectator; audience; tourist; sightseer; passenger
今日はお客さんが来る予定だ。
We're expecting guests today.
お客さんに丁寧に対応した。
I dealt with the customer politely.
お客さんを駅まで迎えに行く。
I'm going to pick up the guest at the station.