Certainly! Here's a brief dialogue in English for the check-in situation you described:
Receptionist: Good afternoon. Welcome to our hotel. Do you have a reservation?
Andrew Swenson: Yes, I do. I’ve pre-booked a room.
Receptionist: May I have your name, please?
Andrew Swenson: Andrew Swenson.
Receptionist: Thank you, Mr. Swenson. I see your reservation here. You have a single room, number 149, for four nights. Is that correct?
Andrew Swenson: Yes, that’s right.
Receptionist: Perfect. Do you have any luggage?
Andrew Swenson: Yes, I have one suitcase.
Receptionist: Great. I’ll just prepare your check-in. Here is your key. Your room is on the first floor. Enjoy your stay!
Andrew Swenson: Thank you very much.
If you'd like, I can also provide a translation or additional details!