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: Does not matter but I do need free wifi and and a star of 0. Sentence2: Nope. That's all. Bye, thanks. Sentence3: I'll be arriving on Saturday and staying 3 nights. Sentence4: You're in luck, I have 9 guest houses available in the cheaper price range. What area of town would you like to stay in? Sentence5: The first train after 12:15 is TR5108 which leaves at 13:29, does that work for you? Sentence6: Thanks for calling Cambridge Town Info Centre. Have a great day. Goodbye. Sentence7: Your reference number is IREQ1EKT . Is there anything else I can help you with today? Sentence8: There are two guesthouses that meet your needs: city centre north b and b in the north and el shaddai in the centre. Would you like to book one of these? Sentence9: No problem, the fee is 64.64 and reference number is B5JCS4TL . Sentence10: Sounds perfect. Please book me enough tickets for the same group of people. Thanks Sentence11: There will be four people. Sentence12: I also need a train. It should leave Bishops stortford after 12:15, going to cambridge on saturday. Sentence13: Your train tickets are all booked! Your reference number is KOOYDYFY . Is there anything else I can help you with? Sentence14: I'm looking for a guesthouse to stay in that is cheap. Can you help me with that? Sentence15: Can we increase the amount of people to 8? Sentence16: I think that is it, got bookings for hotel and train. Sentence17: How many people are in your party and when will you be staying? Sentence18: And how many nights will you be staying? And what day are you arriving? Sentence19: North B and B sounds nice. Could you book this for me? Sentence20: Would you like me to look up anything else for you today? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System