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

[EX Q]: Sentence1: Id is TR0625, travel time is 79 minutes and you will arrive by 22:55. Anything else? Sentence2: Actually, could you help find a train as well? To Norwich? Sentence3: I found a train from cambridge to norwich at 05:36 on Friday, will that work? Sentence4: Sunday would be good. Sentence5: No, you've answered all of my questions. Thanks so much for your time. Bye. Sentence6: The Acorn Guesthouse is a 4 star hotel located in the north side of town. It includes free internet and parking. Would you like me to book it for you? Sentence7: I need to leave after 21:30, is there anything closer to that time? Sentence8: Thank you, and thanks again for using our free service. Sentence9: I am trying to find the Acorn Guest House. Sentence10: No, just leave after 21:30. Will you give me the travel time, arrival time and the Train ID? Sentence11: No, thanks. I will go ahead and book it myself. I think I have all the information I need. Thank you. Sentence12: Is there a time you need to arrive by? Sentence13: Yes there are 14 trains. Which day would you like to depart? Sentence14: Thank you for using our service, have a nice day. Question: Who has spoken the sentence 11? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: No thank you. Im finished. Sentence2: Allenbell is my favorite. It has four stars. The phone number is 01223210353. Shall I book that for you? Sentence3: Is there anything else I can help you with? Sentence4: I found 10 places, do you have a hotel style preference of gueshouse or hotel, or an area you prefer? Sentence5: You're welcome. How many people are in your party, and when will you arrive? Also, how long would you like to stay? Sentence6: I'm looking for a cheap place to stay that does not need free parking. Sentence7: It sounds fine. Do any of them include free wifi? Sentence8: There are three cheap guesthouses in the east area, however, they all have parking. Will this be okay, or would you like to look at a different area or price? Sentence9: Okay. Have a good day. Sentence10: That'd be great. Thank you. Sentence11: All of them include free wifi. Sentence12: What's the phone number and star rating of your favorite one? Sentence13: I will book on my own, thanks. Sentence14: I don't have a preference for the type but I would like a place in the east. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Nope, I think that's it for today. Have a nice one. Goodbye. Sentence2: I would like to stay in the west. I prefer the hotel to have free wifi and be a 3 star. Sentence3: I've got 19 trains that leave on Monday. What time would you like to arrive? Sentence4: Hello I am looking for a guesthouse please. Sentence5: You're welcome. Enjoy! Sentence6: Sure the postcode is cb39lh. Their address is 96 barton road. Sentence7: The TR3173 leaves at 06:54 for a duration of 105 minutes. Would you like a seat booked? Sentence8: And where will you be departing from? Sentence9: I would like the earliest train available please. Can you tell me the train ID and travel time please? Sentence10: There is the hobsons house which is 3 star and has wifi and free parking. Sentence11: Not right now, but I do need to know the fare for that train. Sentence12: I'm departing from leicester. The train should leave on monday. Sentence13: Great. I'll also need a train going to cambridge. Sentence14: Could I please get the postcode, and the address for this guesthouse? Sentence15: I have 24 guesthouses in Cambridge. Do you have an area of the town you'd like to stay in so we can narrow down this list? Sentence16: The fare will be 37.80 pounds. Can I help you with anything else? Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]:
Answer: (B) System