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 was able to book your stay at the Acorn Guest House. Your reference number is SW8AC8GH . Sentence2: Great. If you think of anything else feel free to ask any time. Sentence3: Acorn Guest House is a really nice 4 star place. Free internet and parking too. Can I get you more information? Sentence4: The train ID is TR3267 and the travel time is 79 minutes. Is there anything else I can help you with or would you like to purchase tickets? Sentence5: Yes. Can you give me the train ID and the travel time? Sentence6: Okay I have found several options. Is there a particular area you want to stay in? Sentence7: There is a train departing Norwich at 21:16 on Saturday. Would this be ok? Sentence8: Thank you! That's all I needed. Sentence9: I need to book it for 6 people and 4 nights starting from the same day. Sentence10: Yes, I'd like something in the north, and in the moderate price range, please. Sentence11: There are many options. Is there a certain time you would like to leave? Sentence12: Hello I need to go to Cambridge and will be leaving on Saturday from Norwich, can you tell me what my train options are? Sentence13: I would also like to book a 4 star Guesthouse Sentence14: Yes, I would like to depart any time after 20:15. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System