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

[EX Q]: Sentence1: I have your taxi booked. Look for a blue volkswagen, contact number 07655267463. Is there anything else I can help you with? Sentence2: I need to book a place to stay with a star of 4. I don't need free parking. Sentence3: Can you please provide me with the address, telephone number and the cost of admission. Sentence4: Thank you. Enjoy your stay Sentence5: I now need a taxi to get to the church from the hotel. I would like to leave the hotel by 15:45. Can you book that for me? Sentence6: I don't care about location, just would like a moderate price with 4 stars please. Sentence7: We have 44 attractions in the centre of town Broughton House Gallery is a museum we have available. Sentence8: We have 11 in the moderate range. They are all a guesthouse accommodation. Would you like one of these? Sentence9: I need one with free wi-fi. Sentence10: I have you booked. The reference number is WPGQ4ADJ . Sentence11: After that I'm also going to need the reference number. Sentence12: OK, now can you tell me about some of the attractions in the center of town? Sentence13: I would also need to book it for 4 nights. Sentence14: No, that is all. Thanks so much. Bye. Sentence15: One person, and I'd like to arrive on Tuesday. Sentence16: We have over 20 fine hotels. Do you have any preferences of cost or location? Sentence17: How long do you want to stay? Sentence18: Can i book one on tuesday? Sentence19: OK, let me see what I can do. Sentence20: How about All Saint's Church at 01223452587 in the centre? It's free. Sentence21: before I look for that, could you let me know how many people are staying and what day you'd like to arrive? Sentence22: I have two: a and b guesthouse in the east and avalon in the north. Would one of these work for you? Question: Who has spoken the sentence 18? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: That is all, thank you, goodbye. Sentence2: Is there anything else we can help you with? Sentence3: Goodbye. Sentence4: Ok. Thanks. Sentence5: I am looking for a restaurant in the south part of town and serving portuguese food. What is the address and phone number? Sentence6: Nandos is a portuguese restaurant in the south part of town. Their address is Cambridge Leisure Park Clifton Way and their phone number is 01223 327908 Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Have a good day! Sentence2: Thank you. I am also looking for a place to dine. Im thinking British food and it should be in the centre. Sentence3: Could I get the stars of the hotel and phone numbers? Sentence4: Thank you - that's all I'll need today. I appreciate your help! Sentence5: There are 15 guesthouses with the preferences you have mentioned. Do you have a preference on stars or location? Sentence6: the alpha-milton guest house is a three star location in the moderate price range. their phone number is 122 331 1625. Sentence7: No just as long as it serves British food and is in the centre. I also need to get the post code for the one you choose. Sentence8: There are a total of 18 places that you can stay at. Would you rather have a guesthouse or a hotel? Sentence9: I don't care about the time or day. I would just like the postcode of a restaurant the serves British food in the centre area of town, please. Sentence10: I want to find a place to stay in the moderate price range. Parking doesn't need to be free. Sentence11: The Oak Bistro serves British food and is in the centre. The postal code is cb21eg. Sentence12: I would like a guesthouse please. Oh, and I don't need internet either. Sentence13: What day and time do you plan to dine? Sentence14: We've got seven different places in the center of town to eat with moderate to expensive pricing. Do you have a preference? Question: Who has spoken the sentence 12? (A) User (B) System
[EX A]:
Answer: (A) User