You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I get into town Monday. Is the guesthouse expensive? Sentence2: There is one option. It is the university arms hotel. Sentence3: I want to leave at 15:15 and go to the cambridge chop house Sentence4: I've found 2 hotels that fit your criteria. One is called Gonville Hotel and the other is University Arms Hotel. Sentence5: I don't really care. It's for a business meeting so just need to make sure it's expensive so it's nice. Sentence6: No, we don't have any guesthouses that are expensive. Sentence7: I sure can. If there is a specific type of food you are interested in that would help to narrow down the possibilities. Sentence8: No the price range is fine. Just make sure it is in the same area as the restaurant. Sentence9: I was able to book your table. Your reference number is FFFW4HLE . Sentence10: What day would you be arriving at the guesthouse? Sentence11: What time do you want to leave or arrive by and what is your destination Sentence12: We have two guesthouses in centre that are on the cheap side. The alexander bed and breakfast has a 4 star rating. Would you like that one? Sentence13: I am looking for a restaurant that is in the centre of city and is expensive. Can you help me with that? Sentence14: There are plenty of hotels and guesthouses that would do the trick in that area. Do you have a price range? Sentence15: Great, how many people do you want to book at Guesthouse and for how many days? Sentence16: You are booked. Your reference number is PWFVG1HP Sentence17: Sure thing. Their phone number is 01223366611 . Is there anything else I can help you with? Sentence18: Excellent. Can I get the phone number for the Gonville Hotel? Sentence19: There are 4 people. I would like it to be on Monday and arrive by 15:15. Sentence20: I needed it to be in that side. anyway thanks for your help Sentence21: You're welcome! Have a good day! Sentence22: It is priced cheap. Would you like a different price range? Sentence23: I have a business luncheon this week and need a place to host, preferably in the centre of the city. Sentence24: Okay, I want a reservation for 4 people starting monday, for 3 nights total Sentence25: Yes please just book that hotel for me. Sentence26: I am sorry we have no guesthouse hotels in the centre of town. Would you prefer another location? Sentence27: Are there any hotels like that in that area? Sentence28: Are you sure you would not prefer another side of town? Sentence29: I'd like it to be expensive. Sentence30: Great, I am also looking for an expensive range guesthouse in the same area. Sentence31: Yes, I also need the reference number. Sentence32: Sorry, I actually want an expensive hotel with parking in that same area Sentence33: Thanks. Now I will be needing a taxi please. I want to depart from the hotel Sentence34: Booking completed! Booked red lexus and their contact number is 07732008521. Sentence35: I need a guesthouse that is in the same area as the restaurant, centre, and has free parking, too. Sentence36: No that is all I needed. Thanks! Sentence37: Thanks so much! Sentence38: Is there anything else I can do for you? Sentence39: First I'll need to know how many are in your party, and what day and time you'd like? Sentence40: The Cambridge Chop House would be my recommendation, would you like me to book it for you? Question: Who has spoken the sentence 25? (A) User (B) System
Answer: (B) System