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: The address for Golden Wok is 191 Histon Road Chesterton and post code is cb43hl. Phone number is 01223350688. Sentence2: How about the golden wok? Would you like to make a reservation? Sentence3: You're very welcome! Sentence4: There are quite a few guesthouses in the North. Is there a price range you prefer? Sentence5: Not for now but I do need their address, postcode and phone number. Sentence6: I have 3 of them. Two are expensive and one is moderately priced. Do you have a preference? Sentence7: You're welcome. Have a great day! Sentence8: I have made a booking for your party at Avalon hotel on 62 Gilbert Road. Your reference number is SSSLFOYC . I'm sure you'll love your stay! Sentence9: Can you help me find a guesthouse in the north to stay at? Sentence10: Can you run a search for moderately priced guesthouses please? Sentence11: Yes, I do. The moderately priced restaurant, please. Sentence12: it doesn't really matter. Book it for 6 for 3 nights on sunday, and I'll need the reference number too please Sentence13: Thanks very much for your help today. Sentence14: Do you need free parking or free internet (or both!)? That will help me narrow it down even more. Sentence15: Thanks for everything goodbye. Sentence16: I would love it more if I wasn't starving. Can you point me in the direction of a good Chinese restaurant near my hotel? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User