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 need a cheap guesthouse in the north. I'm looking for information not reservations. Sentence2: Could you tel me the star of the hotel? Sentence3: Yes, please book 3 tickets. Sentence4: Great I'm also looking for a place to stay in the expensive price range with free parking. Sentence5: I have 2 guesthouses, when are you planning your stay, I am sorry Sentence6: There are 19 trains available on that day. Do you have a departure or arrival time in mind? Sentence7: Arrive by 11:30. Sentence8: I have booked 3 tickets on TR4969. Your reference number is MPL4USAC and the total fee is 42.24, payable at the station. Can I assist you with anything else? Sentence9: What area of town could you like the hotel to be located? Sentence10: It is a 4 star hotel. Sentence11: Do you want to stay in a certain area? Sentence12: Ok great. There are two places available. I highly suggest the Worth House. What information do you need? Sentence13: I am planning a trip in Cambridge. Sentence14: There are none with that criteria in the North. Shall I change or try another area? Sentence15: Thank you for reaching out to Cambridge TownInfo Centre. Goodbye. Sentence16: Could you try a cheap one then? Sentence17: I'd recommend TR4969. It arrives by 10:55. Would you like a ticket? Sentence18: No,I am actually looking for information about trains going from Cambridge to Norwich on Sunday. Sentence19: great, thank you for your help. goodbye Sentence20: I would lkle to stay In the north please. Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System