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

[EX Q]: Sentence1: Hi, I'm looking for a 1 star place to stay with free wifi. Sentence2: Well, I'd like to book one. I don't think it matters which one. Sentence3: You are welcome, goodbye. Sentence4: There are 5 guesthouses with 4 star ratings in Cambridge with moderate to cheap price ranges. Would you like more information? Sentence5: Alright. I wanted a 1 star, but I guess I can listen to the 2 star options. Sentence6: Okay, how many people will be in your party? Sentence7: Hmm. What do you what about 4 star hotels? Sentence8: No, that is all. Thank you. Bye. Sentence9: What dates would you like to book the room for? Sentence10: I have 2 on the north side that are in the moderate price range and 1 on the east side in the expensive range. Would you like to book one. Sentence11: I need it for two nights starting on Saturday. Sentence12: It would be for 7 people. Sentence13: I'm sorry there are no 1 star hotels with internet, would you like me to search on 2 stars, we have a few hotels available. Sentence14: I have booked you at the A and B Guest House at 124 tenison road. The reference number is 0J08KUGQ . Can I help you with anything else? Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[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: I would like Italian please. Sentence2: I don't need to book just yet. But could you help me located a New Zealand restaurant? Sentence3: Okay please book a table for five people on tuesday at 18:00 and give me the reference number Sentence4: The TR3456 from London Kings Cross on Tuesday departs at 13:17 and arrives at 14:08. Shall I book that for you? Sentence5: What area of town do you prefer? Sentence6: Actually, let's look for the train first, please. I'll be traveling from London Kings Cross to Cambridge on Tuesday and I'd like to arrive by 15:45. Sentence7: I's sorry, but could you give me the actual train travel time between the two cities? I'm not good at math. Sentence8: Could you try to book that again for 5 people at 18:00 on Tuesday? Sentence9: Wagamama is an expensive Japanese restaurant in the centre of town. Sentence10: Thank you and enjoy your stay in Cambridge! Sentence11: Great news, the booking system is back up and I made your reservation! The Ref. # is ETUL1R4O . Anything else I can do? Sentence12: It doesn't matter the part of town. Sentence13: There are no other Japenese Restaurants in that area. Sentence14: help me narrow down the choices by giving me the price range Sentence15: Thank you very much. That is all for today. Sentence16: Hello! I am about to go to Cambridge and I would like some information about local restaurants. I also need to see if I can book a train to Cambridge that gets there before 15:45. Sentence17: Unfortunately, we no longer have any new zealand restaurants in the city. Can I search for something else for you? Sentence18: We have many options for restaurants. What food type are you interested in eating today? Sentence19: Is there another Japanese restaurant in the center of town? Sentence20: It takes 51minutes. Sentence21: Thanks, could you also recommend could you help you help me find a place with japanese food? Sentence22: I am unable to book it at this time. Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]:
Answer: (B) System