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: There are 4 theatres in the centre: ADC, Cambridge Arts, Mumford, and The Cambridge Corn Exchange. Sentence2: Sure, the ADC Theatre is on park street, postcode cb58as. Sentence3: Both hotels have free parking. What day, time and how many people would you like to make this booking for? Sentence4: Thank you for choosing our service. Have a great day! Sentence5: No thank you. Have a great day! Sentence6: I am looking for places to go in the centre of town. Sentence7: I would like the 4 star one. I need it starting thursday for 4 nights and 6 people. Sentence8: great, your reference number is DYLWUDB2 Sentence9: The name of the guesthouse is Alexander Bed and Breakfast, and it is located at 56 Saint Barnabas Road. Would you like their phone number? Sentence10: There are many attractions in the town centre. Is there a particular type you have in mind? Sentence11: Great, thanks. I also need a place to stay that is also in the centre. A guesthouse is my preference if available. Sentence12: Is there a theater in the centre? Sentence13: Thank you very much, that is everything I need. Sentence14: Any of those places are fine. Could I have the address of one of them? Sentence15: Yes, I've got two guesthouses that match those criteria, one with 4 stars and one with 0. Would you like me to book you at one, and if so, which? Sentence16: Please book the one that has free parking. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User