You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Unfortunately, I could not find a barbecue restaurant using your criteria. Is there another type of restaurant you would like to consider? Sentence2: If this guesthouse is available please book it for me. By the way, what is the price per night? Sentence3: I need a 3 star hotel in Cambridge, that offers a guesthouse, can you book it for me ? Sentence4: Great can you book that for 1 person for 3 nights starting friday? Sentence5: Before I book, is the guesthouse located in the south part of town and at what price range? Sentence6: Neither of the restaurants in the centre are available at that time. Would you like to try a different time? Sentence7: I do not have the prices, what day would you like to stay, for how many nights, and how many people? Sentence8: That is it for today. Thank you so much for your help. Good bye. Sentence9: thank you for booking that and the reference number Sentence10: Yes please, I need to book a taxi to the restaurant from the hotel for the dinner reservation. Sentence11: Thank you for using Cambridge TownInfo centre. Please remember us for all of your future travel needs. Sentence12: There are no modern European restaurants in the North but there are 2 in the town center. Do you want to book one or change type of restaurant. Sentence13: I was able to book restaurant alimentum reference number is HCY10A2Z Sentence14: How about 10:00 on the same day as before? Sentence15: Yes, I am also looking for a barbeque restaurant in the same area and price range as my hotel. Sentence16: I'd like to book one for the same group of people at 11:00 on the same day as before. Sentence17: Yes, hamilton lodge is located on 156 chesterton road. Sentence18: The hotel is found in the Northern part of town and it is in the moderate price range Sentence19: Is there anything else I can help you with today? Sentence20: Ok, a grey honda will pick you up at the hamilton lodge in time to arrive at restaurant alimentum for your 10:00 reservations. Taxi contact number is 07242149665. Anything else? Sentence21: Yes, are there any modern european restaurants in that area? Sentence22: i have your room all reserved. The reference number is R1E3QVGT . Is there anything else I can assist you with? Question: Who has spoken the sentence 1? (A) User (B) System
A:
Answer: (B) System