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: Sure thing. Where will you be travelling from and on what day? Sentence2: Yes, it sounds great. Can you book 8 seats for me please? Sentence3: Great! Train TR6913 leaves at 19:54 and arrives by 20:43, with a price of 12.80 pounds. Would that work for you? Sentence4: I recommend the museum of archaelogy and anthropology Sentence5: Your booking was on TR6914 not TR6913. Your reference number is 4L2BQ9VA . Can I help you with anything else today? Sentence6: I will be departing from Stevanage on Tuesday. Sentence7: They are located at university of cambridge, downing street and there is no entrance fee. Would you like their phone number as well? Sentence8: I'm looking for interesting museums in the centre of Cambridge, can you recommend me any? Sentence9: Not right now, but thanks. I do need a train to cambridge that leaves after 18:30, though. Sentence10: Thank you for contacting Cambridge TownInfo Centre, have a great day! Sentence11: That sounds great! Can I have their address? Sentence12: No, thank you! Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User