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: 4 stars, please, but still just moderately priced. Sentence2: One with free parking would be great! Sentence3: Thank you. Can you tell me if there is a train going to Norwich on Friday? Sentence4: My apologies, the train ID is actually TR4886, it costs 17.60 pounds per ticket and is a 79 minute trip. The train arrives at 21:55. Sentence5: I found 11 guesthouses matching your preferences. Do you have a star rating you'd prefer? Sentence6: You are welcome, what else can I do for you today? Sentence7: I have 19 trains departing for Norwich on Friday. Do you have a preferred departure time? Sentence8: I have 7 guesthouses that fit your needs. Do you have any other preferences? Sentence9: Hi, I am looking for a guesthouse to stay on the north side of Cambridge. Sentence10: Yes, after 19:45 and departing from cambridge please. Sentence11: Okay, thank you for your help! Sentence12: Great can I get the address of one and whether or not they have free parking? Sentence13: Okay, the TR4885 train leaves at 20:36 and arrives by 21:55. Would that work for you? Sentence14: Nope, that's everything. You've been very helpful. Sentence15: Yes, I think that will work. Can you tell me the price, travel time and confirm the arrival time please? Sentence16: There are 6 guesthouses that match your criteria. If you give me your length of stay and beginning date perhaps I can narrow them down for you. Sentence17: Thank you very much! I am glad i was able to you find everything you needed. Have a wonderful day and I hope you'll use our service again. Sentence18: Arbury Lodge at 82 Arbury Road has free parking. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System