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

Q: Sentence1: Goodbye. Sentence2: Nandos sounds great. Thank you. Sentence3: Goodbye. Sentence4: thank you good bye Sentence5: Yes, I'd like a restaurant that serves portuguese food. Sentence6: nandos is the only restaurant i can find in the south that serves portuguese. Sentence7: Hi. I'm trying to find a good restaurant in the south part of town. Sentence8: There are several good restaurants in the south part of town. Do you have a preference for the type of food or price range? Question: Who has spoken the sentence 2? (A) User (B) System

A: Answer: (A) User
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Q: Sentence1: Could you check the spelling(city centre north b and b) and try to search again? Sentence2: The TR2512 takes 51 minutes. Anything else you need? Sentence3: I will be traveling on Thursday. Sentence4: It is a cheap, 0 star guesthouse located at 328a histon road on the north side. It has free internet and parking. Phone number and postcode are 01223312843 and cb43ht. Sentence5: Yes I am looking for information on a hotel called City Center North B and B. Sentence6: Sure! give me the following information: Day of visit, number of people and number of days that you will be staying. Sentence7: I cannot find that hotel. Any other hotels you would like to find? Sentence8: You're all set. Your reference number is HOSVDEGA . Can I help you with anything else today? Sentence9: Do you have a time preference? Sentence10: Well that will not work. Sentence11: I need to arrive by 14:15. Sentence12: there are many trains but you need to tell us which day you want to travel Sentence13: I am also looking for a train into Cambridge from London Kings Cross. Sentence14: Please book for 2 people starting on thursday for 4 nights. Sentence15: enjoy your stay in Cambridge! Sentence16: The TR2512 will fit your needs. Would you like to book this train? Sentence17: The first train leaves at 5:17. Sentence18: Thank you. Are you able to book that for me? Sentence19: Not at this time. What is the travel time for that train, please? Sentence20: no that will be all thanks Question: Who has spoken the sentence 19? (A) User (B) System

A: Answer: (B) System
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Q: Sentence1: they are many here. we can narrow them down by stating how many stars you want. Sentence2: I've got another request I need assistance with please. I am looking to Stansted Airport via train and need help booking it. Sentence3: that could be anywhere. book for me for 3 people and 4 nightsstarting from sunday. Sentence4: Okay sounds good can you make a booking for 3 people and 4 nights starting from sunday. Sentence5: No, but I'd like it to be moderately priced. Sentence6: Please help me find a guesthouse or hotel that has free parking. I prefer a guesthouse though. Sentence7: Sure, do you know what day you're traveling? Sentence8: There are many. Is there a particular area you prefer? Sentence9: The acorn guest house is a good option for you. Sentence10: Where will you be departing from? Sentence11: I will travel on Thursday. Sentence12: Great! I booked that room for you. Here is your reference number RKBQJ4LX . Question: Who has spoken the sentence 11? (A) User (B) System

A:
Answer: (B) System
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