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 have only found 1 train from Cambridge to London Kings Cross on Wednesday. It leaves at 23:00. Will that work? Sentence2: I would recommend the Cambridge Belfry Hotel. It is 4 stars and has excellent ratings. Would you like more information? Sentence3: That would be fine. I also need a train that leaves after 21:30 on wednesday. Sentence4: That doesn't matter to me but I do want to make sure I stay somewhere with free parking. Sentence5: I'd be happy to help. Where are you traveling to? Sentence6: I will go to London's Kings Crossing from Cambridge. Sentence7: Yes, could you tell me the postcode and the price range? Sentence8: The Cambridge Belfry post code is cb236bw and it is fairly cheap compared to other hotels in the area. Sentence9: I have two guesthouses and two hotels. Any preference? Sentence10: What have you got on the west side, in the way of places to stay offering free wifi? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System