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

Ex Input:
Sentence1: There are 2 expensive French restaurants. Restaurant Two Two, and Cote. Which would you like to book? Sentence2: No, that's everything I needed today. Thank you. Sentence3: Are you able to find me a french expensive restaurant? Sentence4: You're quite welcome! Thanks for contacting the Cambridge TownInfo Centre and have a great day! Sentence5: I like the sound of Restaurant Two Two, could you give me their postcode, address and phone number? Sentence6: Restaurant Two Two is located at 22 Chesterton Road, Chesterton. Their postcode is cb43ax. You can reach them at 01223351880. Any other information I can provide? Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Your table is booked (ref# SCHAG4OI). What time do you need that taxi? Sentence2: The phone number is 01223240089, and the post code is cb17sr. Is there anything else I can assist you with? Sentence3: Thanks. That is all for now. Sentence4: Aylesbury odge guesthouse,I will book it for you,is there anything else I can do for you ? Sentence5: Are any a guesthouse? Sentence6: Okay. Please call us if we can help you further. We hope you enjoy your stay. Sentence7: the good luck chinese food takeaway is great. Shall i book it ? Sentence8: No I just need you to recommend one for me. Sentence9: I don't need you to book it, I just need the phone number and post code please. Sentence10: Hello, I am looking for a place to stay that has free parking in the South area. Can you help me with that please? Sentence11: What time would you like to dine, and how many will be in your party? Sentence12: Thanks, also looking for a restaurant in the same part of town in the expensive range. Can you recommend one? Sentence13: I'd like it to arrive in time to get us there before 12:15. Sentence14: Yes I have 3 guesthouses matching your criteria. Would you like to book one of them? Sentence15: Your black ford taxi has been booked and your contact number is 07103139053. Sentence16: I have four options ranging in price from cheap to expensive ranging in from 3 to 4 stars. Sentence17: There will be 6 of us. We'd like 12:15 on Saturday please. Sentence18: Please book the restaurant and I also need a taxi. Question: Who has spoken the sentence 7? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: I was unable to find a 1 star guesthouse with free parking. Would you like to up the stars? Sentence2: You're welcome. Enjoy your day. Sentence3: That's OK, I'll do it later. Can you tell me if there are any trains departing Cambridge on Tuesday? Sentence4: It's a 79 minute trip, and the fare is 17.60 pounds. Is there anything else I can help you with? Sentence5: How about the Archway House which is a guesthouse in the north and their phone number is 01223575314. I can book it for you if you would like. Sentence6: Hi. I need to book a guesthouse that has free parking, can you help me? Sentence7: There are 21 guesthouses which offer free parking. Which area do you prefer to stay in? Sentence8: Yes there are many trains leaving on Tuesday from Cambridge. What is your destination and the time you would like to arrive? Sentence9: That is fine. Can I have the phone number and the area that the guesthouse is in? Sentence10: It should leave after 9:15 and go to Norwich. Sentence11: Thank you, that is all the information I need currently. Sentence12: The first available train after your preferred time is TR9942 with a departure time of 09:36 and an arrival time of 10:55. Would you like a ticket for this one? Sentence13: Not right now but can I get the travel time on that? Sentence14: I am open to any area, but the hotel should definitely have only 1 star. Sentence15: How about 4 stars? Sentence16: I found quite a few that meet that criteria. How about the archway house? Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System