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 would prefer the north please. Sentence2: I have found 13 of them. Can you please be more specific about what you would like? Sentence3: I'd like to find a college to visit in the center of town. Sentence4: No thank you that will be all Sentence5: I would suggest the acorn guest house it is a great place to stay. Sentence6: That will be fine. I'll need to book for Saturday, 3 nights, and 1 person. Sentence7: You're all set! Your reference number is 41BK9PC7 . Sentence8: moderate price range thank you Sentence9: There are 32 hotels that offer free internet, is there a price range or area you prefer? Sentence10: Actually one more thin, I need a taxi from the hotel to the restaurant, I want to leave at 09:45. Sentence11: Thank you! Can you also help me find a place to stay with free wifi? Sentence12: I narrowed it down to 17. What part of town would you prefer and do you want free parking? Sentence13: No that will be it for today. Sentence14: I recommend Emmanuel college. Their address is saint andrew's street Sentence15: Okay, I booked a yellow honda and their contact number is 07225232221. Do you need help with anything else? Sentence16: You can choose one for me and give me the address. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System