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

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: I'm looking for a 0 star guesthouse in the north. Sentence2: We have 23 museums in Cambridge. Could you help me narrow down your search with an area or price range? Sentence3: Sure. Have a nice day. Sentence4: There is the City Centre North B and B. Would you like me to book this for you? Sentence5: You as well! Goodbye! Sentence6: Unfortunately, I don't have any guesthouses that are in the expensive range. Is there any other price range you would consider? Sentence7: Yes. I can go ahead and book that for you if you can give me the the days you'd like to stay. Sentence8: Unfortunately I was not able to book that time slot for you. is there another day you would like to try? Sentence9: Sure, Cambridge Artworks Museum is on Greens Road, post code cb13ef. Is there anything I else I can help you with today? Sentence10: Great! Thanks for using our service. Sentence11: How about one in the cheap price range? Sentence12: Howdy! I'd like to go to a museum. Sentence13: Okay, I was able to book you for 2 nights with 8 people at City Centre North B and B. Your reference number is NXW9XX08 . Is there anything else? Sentence14: Can you recommend an expensive guesthouse? Sentence15: Is that in the cheap price range? Sentence16: Can I book for 8 people for 3 nights starting Tuesday? Sentence17: Could you recommend one to me? I am not looking for one in particular. May i also have it's postcode? Sentence18: I believe that's your job, right? Could you book it for me? Sentence19: Looks like there's some confusion. I need the hotel on Tuesday, for 3 nights, and 8 people. If that doesn't work, try 2 nights instead. Sentence20: There are no zero star places in that area, can I checked another area for you or another star rating place? Sentence21: Thank you. No, that will be all. Sentence22: If you could, that would be awesome. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User