When someone arrives at a hotel check in or reception, he can say his name and then: I have a reservation.

当某人来到宾馆登记时，他可以先说自己的名字，然后说。

youdao

I'll call the hotel. I'll tell them we'll check in tomorrow.

我会给旅馆打电话，通知他们明天我们将登记入住。

《柯林斯英汉双解大词典》

Furthermore, my sightseeing schedule was unaffected by hotel check-in and check-out times.

此外，我观光的计划不受旅店的入住和退房时间所影响。

youdao

It would then, for example, be possible to use a kiosk in a hotel lobby to check out of the hotel, look up the status of your flight, and then check in for it.

ECONOMIST: REPORTS

According to the Mystery Shopping Providers Association (MSPA) there are some 30, 000 of them in the U.S., hired by luxury hotel brands to check-in anonymously and judge mercilessly.

CNN: Confessions of a hotel mystery shopper

If your business is government related, or you just want a peaceful location in the heart of town, check into the Capitol Hotel Tokyu in the Akasaka district, a popular holdover from the 1960s (the Beatles stayed here), which was razed and replaced with a 29-storey tower in 2010.

BBC: Business trip: Tokyo