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: Wonderful. Please don't hesitate to contact me again for more help. Good bye. Sentence2: And what are your departure and arrival stations? Sentence3: No thanks, but can I have the postcode and price range for the Acorn, please? Sentence4: The acorn guest house has a 4 start rating. Would you like to hear other options? Sentence5: Yes that train's ID is TR2854 and the travel time of the journey is 105 minutes. Is there anything else I can help you with? Sentence6: There are several trains that would get you Leicester by 14:45. Did you have a departure time in mind? Sentence7: No, I don't need internet or free parking. Could you tell me the star ratings for those? Sentence8: Ok there is one that leaves Cambridge at 12:21 and arrives in Leicester at 14:06. Would you like to book that one? Sentence9: I have no preference for departure time as long as I arrive by 14:45. Sentence10: There is the acorn guest house, out of 33 results, did you need internet, parking, or a certain star? Sentence11: Yes I am looking for a guesthouse on the north side of town. Sentence12: I need a train on Wednesday, arriving close to 14:45. Sentence13: Yes that sounds good, can you please give me the train ID and travel time? Sentence14: I will be leaving from Cambridge and arriving in Leicester. Sentence15: Sure, the postcode for Acorn Guest House is cb41da and the price range is in the moderate range. Sentence16: Great thank you that's all the info I need today. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User