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: They both have free parking. I'd recommend the University Arms Hotel in the centre. Can I book this for you? Sentence2: Unfortunately, I don't have any matches in my system. Is there something else I can look for? Sentence3: How about one in the cheap price range? Sentence4: There are several guesthouses in the cheap range all over town. What area do you prefer? Sentence5: Hello, can you give me some information on a train? Sentence6: Yes, I need a 4 star hotel in the expensive price range. Sentence7: Okay, there are several departure times that fit what you're looking for. The earliest is 5:16. Would you like me to book that for you? Sentence8: I plan to go to Cambridge and will be departing from norwich on Saturday and plan to ride a train that should arrive cambridge by 16:00. Sentence9: Train id is TR2602, travel time is 79 minutes and the price is 14.08 pounds. Is there anything else you need? Sentence10: I absolutely can. Where are you looking to go? Sentence11: Can you give me the travel time, departure time and train id for the one arriving closest to 16:00 please? Sentence12: It needs to have free parking. Sentence13: I'm sorry, I actually need a guesthouse. Sentence14: We have huntingdon marriott hotel in the west and university arms hotel in the centre, any preference? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User