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

[EX Q]: Sentence1: Then you are all set? Sentence2: I booked you a black volvo. The driver can be reached at 07410117478. Is there anything else I can help you with today? Sentence3: I'm sorry, I clearly wasn't paying attention. Yes that is all I need. Sentence4: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 0IJIWWQ9 . What else can I help you with? Sentence5: We have five hotels that meet that criteria, are you looking for a specific part of town? Sentence6: Yes. Have a great day. Sentence7: Anything in the centre would be fine, whatever you recommend. Sentence8: Regretfully, I don't have a listing for Venetian cuisine. Do you have a second choice? Sentence9: I'm looking for a place that has 3 stars and free parking. Sentence10: There are over a hundred restaurants to chose from do you have a price range? Sentence11: Does that one have free internet as well? If so it will work great for me. Sentence12: Yes I can. What type of place to stay would you like? What area of town? Sentence13: Yes the hamilton lodge is 3 stars moderately priced and offers free wifi and parking. Sentence14: There are 4 results. restaurant one seven, the oak bistro, the copper kettle, and cotto. Would you like more information on any of those? Sentence15: Sadly, I don't have access to that information. The Oak Bistro might be a good choice. Their phone number is 01223323361 if you'd like to call them Sentence16: Thanks, I need a taxi to commute between the two places. Sentence17: I am not looking for a specific area, but I would like for it to be in the moderate price range, please. Sentence18: Definitely something moderately priced. If you can't find Venetian, how about British? Sentence19: Thank you for calling. Sentence20: I'm looking for a restaurant that serves venetian food. Sentence21: Yes, please. Find out which of the four restaurants have vegan options, please? Sentence22: How about the hamilton lodge it's located in the north. Sentence23: I am traveling between the two places discussed, I need to reach the restaurant by the booked time. Sentence24: I can help you book a taxi but first I need some information - where are you leaving from and what's the destination. Also what time do you want to leave? Sentence25: I also need a place to stay. Can you help with that? Sentence26: Okay, well, let's go ahead and book a table for one at 11:30 on Tuesday. Question: Who has spoken the sentence 18? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I am looking for a police station in Parkside Sentence2: Best wishes to you. Have a good day. Sentence3: No. That's all I wanted to know. Thanks. Sentence4: There is a police station in Parkside. The postal code is CB11JG and the phone number is 01223358966. Is there anything else I can help you with? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: That will be all for today thanks ! Sentence2: Yes please book a seat and send me a reference number. Sentence3: Does it leave on Sunday? Sentence4: I'd recommend the acorn guest house. It has free wifi and parking. Would you like to book a room? Sentence5: I have booked you a seat and the reference number is : 6IJ7W2BN . Sentence6: Awesome. Thank you for using the Cambridge TownInfo centre. Have a great day Sentence7: 01223353888 is the number, the post code is cb41da. Can I help with anything else today? Sentence8: Thanks so much. Can you also find me a place to stay? Sentence9: No that's ok. Can I just get the phone number and postcode? Sentence10: Definitely - we have 33 great places to stay in town. If you can give me some specific requirements, I can narrow it down to the perfect place for you. Sentence11: Can you please find me a train that leaves to bishops shortford? Can it also arrive before 10:45 too? Thankyou for your time. Sentence12: No, that one leaves on Friday. TR9219 leaves Sunday at 5:29 and arrives in Cambridge by 6:07. Would you like to book a seat? Sentence13: I would like a 4 star moderately priced guesthouse in the north. Sentence14: I have the TR2061 that arrives at 06:07. Will that work? Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]:
Answer: (B) System