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: Ok. Thank you and good bye. Sentence2: No that will be all thank you so much. Sentence3: That sounds great, can you get me 6 tickets? Sentence4: Booking was successful, the total fee is 450.6 GBP payable at the station . Reference number is : PEY94A3O . Can I help you with anything else? Sentence5: The postcode for the cambridge artworks is cb13ef Sentence6: What museums are in Cambridge? I am asking "for a friend". Sentence7: I'm not too particular on the location. Do you have any that you recommend? Sentence8: There are 23 museums in Cambridge, so it would be a bit much to list them all. Can you give me a specific area to look in? Sentence9: That sounds good. Can you give me the postcode for the Cambridge Artworks? Sentence10: how about TR9195? it leaves at 0501 Sentence11: Thank you. I also need info on a train. It should go to Birmingham new street and leave on Monday. Sentence12: Sure. I suggest the Cambridge Artworks. It's in the east section of the city, and is free. Would you like any more information? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System