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

[EX Q]: Sentence1: Thank you goodbye. Sentence2: the cow pizza kitchen and bar is a moderately priced gastropub in the centre of town. It's located on Corn Exchange Street, and the phone number is 01223 308871. Sentence3: Can I have the address and phone number of a gastropub in the centre of town? Sentence4: There are three gastropub restaurants listed. One is in the east part of town and the rest are in the centre. Sentence5: I would like the address and phone number of the one in the east part of town. Sentence6: A moderate priced irish food restaurant. Sentence7: thank you and good bye Sentence8: there are no irish restaurants. Would you like to choose another type of food? Sentence9: I'm sorry, it appears there are no results for the east part of town. Our system is having difficulty of some sort. Sentence10: Yes, could you please check whether there is a gastropub? Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Which day would you like to leave? Sentence2: i want to leave on friday Sentence3: I'm looking for a decent place to dine in Cambridge please. Sentence4: Their phone number is 01223324033 and address is Regent Street City Centre. Was there anyting else I could help you with? Sentence5: I would like to book a train to ely, from cambridge. Sentence6: The train should leave after 11:15. Thanks Sentence7: We have 15 italian places Cambridge, do you have and needs as far as area and pricing? Sentence8: how about canapes food? Sentence9: What type of cuisine are you interested in? Sentence10: Sorry, we don't have any places serving canapes food. Would you like to search for something else? Sentence11: Could you please try for Italian ? Sentence12: No thanks. I just need the address, postcode, and phone number for this restaurant please. Sentence13: There are 10 trains that meet your criteria. Do you have a departure time or arrival time in mind? Sentence14: We have a great place on Regent Street City Centre called Pizza Express that you are sure to love. Would you like me to make reservations for you? Sentence15: Train TR0767 leaves Cambridge at 11:50 and arrives at ely at 12:07. The fare is 4.40 pounds. The travel time is 17 minutes. Do you want me to book this? Sentence16: Have a lovely day, goodbye! Sentence17: no thats all the information i needed. thanks Sentence18: Lets try for a moderately priced place in the centre. Question: Who has spoken the sentence 17? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I would like to leave after 18:30. Sentence2: Sure the travel time is 49 minutes. Would you like to make a reservation for that train? Sentence3: Can I get the travel time for that train? Sentence4: Yes, they have a room available for you and it's booked for 4 nights starting Tuesday, your confirmation number is VRN7SQL2 . Sentence5: That was all I needed today, thanks! Sentence6: Yes I would like a guesthouse in the north. Sentence7: The TR9082 departs at 19:21. Would you like me to create a booking for you? Sentence8: I would suggest the acorn guest house. Sentence9: You're very welcome! Have a great day! Sentence10: Can you help me find a place to stay that has free parking and free wifi? Sentence11: The trainID TR9082 and will leave at 19:21 and arrive at 20:10. The cost is 12.80 pounds. Sentence12: That sounds great do they have a room for just me? I'm checking in Thursday and will be staying 4 nights. Sentence13: No need to book. Can I please get the travel time for that train please? Sentence14: There is another train, TR6530, that leaves at 21:21 and arrives at 22.10. The cost is 12.80 pounds. Is there anything else I can help you with today? Sentence15: I am going to Stevenage. Sentence16: There is lots of places to stay. Do yo have any more preferences ? Sentence17: i am also looking fora train from cambridge on monday Sentence18: What is your destination? Sentence19: There are 10 available trains that day. Could you please provide me with your departure time and what time you would like to arrive by? Sentence20: Okay thanks so much. I appreciate the help. Question: Who has spoken the sentence 19? (A) User (B) System
[EX A]:
Answer: (B) System