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 acorn guest house is in a moderate price range and the address is 154 chesterton road. Sentence2: You're welcome, can I help you with anything else? Sentence3: No, but I do prefer a guesthouse. Sentence4: Pick one for me. I want to book it for myself on friday at 16:15. Sentence5: Perfect, that is all that I need. Thank you so much for your help! Sentence6: There is the Curry Prince and Rajmahal which meet your criteria. Sentence7: Can you tell me which one is your favorite, and let me know the price range and address for that one? Sentence8: Just let us if you need additional assistance in the future. Goodbye. Sentence9: There are 4 restaurants that match your description. Any opinion on price? Sentence10: I booked Curry Prince for you for Friday at 16:15, table for one, reference number G6570XEX . The table will be reserved for 15 minutes. Sentence11: I am also looking for a restaurant that serves indian food in the east area. Sentence12: What about price range? Sentence13: I would like something moderately priced please. Sentence14: I have tons of options available. Is there a particular area you would like? Sentence15: No, thank you! Sentence16: I'm looking for a place to stay in cambridge, free parking and wifi should be included Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System