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: It doesn't matter on the pricing or about having free parking. I would like the hotel to be like a guesthouse. Sentence2: Thanks, that's all I needed today. You've been a great help. Goodbye! Sentence3: Yes actually, could you book that for me? I've changed my mind. Sentence4: Okay, do you have any price range you're looking for? Sentence5: That won't be necessary thanks. Sentence6: I am also looking for a train on the same day as my hotel booking that goes to cambridge that arrives by 20:00 and departs from stevenage. Sentence7: What day would you like that reservation? Sentence8: Thanks for using our service. Have a great day. Goodbye. Sentence9: The reference number is M8CQ8Y16 . Sentence10: Could I get the reference number? Sentence11: Yes please, that would be wonderful. I would like a booking for 4 people, and the reference number, please. Sentence12: I need a place to stay in South of town. Sentence13: That's fine. I'm here to help. For how many people and how many nights will that be? Sentence14: Friday, and after 20:00. Sentence15: TTR7278 leaves at 17:54 and arrives at 18:43, cost is 12.80 pounds per person, would you like me to book you? Sentence16: Is there anything else I can help you with? Sentence17: The stay is for 4 of us for 3 nights. Sentence18: Aylesbray lodge guest house fits your needs. Would you like me to book that for you? Sentence19: I was able to book you for 4 tickets on train TR7278. The total fee is 51.2 GBP payable at the station. Sentence20: Friday, please, and for 3 nights. Thank you! Sentence21: OK, any date or time preferences? Sentence22: Booking was successful. Your reference number is PYDLXTII . Can I help you with anything else? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System