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

[Q]: Sentence1: I am interested in finding a great nightclub to take a friend to. Sentence2: I've booked a table for 5 on Monday at 17:30. The reference number is MUBJSMLX . Is there anything else I can help you with? Sentence3: I have found 4 restaurants. Do you have a preference of area? If not that Kohinoor in the centre is very popular. Sentence4: Great that was all that I needed today, thank you. Sentence5: Cambridge has lots of great options. Club Salsa is quite popular and is in the centre. Sentence6: I have arranged for a black Honda to have you arrive at Kohinoor by 17:30. The contact number for the Taxi is 07997403672. Is there something else I can assist with? Sentence7: That sounds great. How much is the entrance fee? Sentence8: Perfect, can you also help me find a place to eat that is cheap and serves Indian food? We are looking to accommodate 5 people at 17:30 on Monday. Sentence9: Just book it on Monday please, for 5 at 17:30. Sentence10: Perhaps their phone number? Sentence11: The phone number is 07782218745. Sentence12: The Club Salsa entry fee is 5 pounds. Can I help with anything else? Sentence13: You're welcome! Have a good day. Sentence14: We need a taxi from Club Salsa that will get us to Kohinoor in time to eat. Can you make that happen? Question: Who has spoken the sentence 13? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: Maybe you could try again? Sentence2: I am looking for a place to stay in cambridge in the moderate price range with 4 stars Sentence3: I found the restaurant you want. Do you want me to make reservation? Sentence4: I am having a hard time booking this, could I make sure the place you would like is the Pizza Express at Fen Ditton? Sentence5: There are 11 matches. Do you have a preference for hotel types? Sentence6: Yes, for 5 people on Friday around 13:45, please Sentence7: I am not able to book anything right now. Sentence8: Okay....well I'm over here waiting....don't forget the reference number too Sentence9: I will go ahead and book that for you now. Sentence10: Thanks for the room booking. Can you locate a restaurant for me, too? The name is pizza express Fen Ditton. Sentence11: The booking worked this time! The reference number is S31A87TV . Anything else today? Sentence12: No problem. If you need anything else just call us back. Sentence13: Yes it is, but if 13:45 time isn't working then 12:45 would also be acceptable. Sentence14: Great, thanks for your help! Have a good one. Sentence15: You have a room booked at the Warkworth House (ref# TP8X26LA). Can I help you with anything else? Sentence16: No, but it should be in the east. Sentence17: I have 3 guesthouses matching your request. Do you care about parking? Sentence18: Pick one and book me for 5 people lasting three nights starting Friday please. Question: Who has spoken the sentence 15? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: The Lensfield does have free wifi. Their phone number is 01223355017 and their postcode is cb21en. Sentence2: First, can you give me the phone number, postcode, and tell me if they have internet? Sentence3: Is it a guesthouse? I'd really like a guesthouse with 3 stars, if possible. Sentence4: That is perfect, thank you for your help. Goodbye. Sentence5: Unfortunately, I can't find a 3-star expensive guesthouse with free parking. Would you like me to find something else? Sentence6: Sure, The Lensfield hotel is in the south. It is very nice, can I book it for you? Sentence7: Express by Holiday Inn Cambridge is an expensive hotel with free parking. Their phone number is 01223866800. Sentence8: I'm looking for an expensive place to stay with free parking please. Sentence9: Let us know if you have any more questions! Sentence10: How about a hotel instead of a guesthouse? Question: Who has spoken the sentence 2? (A) User (B) System
[A]:
Answer: (A) User