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 would like the oak bistro. Sentence2: Yes, table for 2 at 13:30 on Friday. If not available then Tuesday. Need reference number as well. Sentence3: ballare's phone number is 01223364222. Can I get you anything else? Sentence4: No, we are all set, thanks for making this trip easier. Sentence5: Great choice. It is at 6 Lensfield Road. Would you like a reservation? Sentence6: Yes can I get the phone number of one you'd recommend? Sentence7: It was my pleasure to be of service. Goodbye. Sentence8: I'd like a moderately priced one. Sentence9: I made the booking for Friday. Your reference number is 0Z3UX3DM . Do you need anything else? Sentence10: I am seeking a restaurant that serves British food in the centre. Sentence11: There are 4 restaurants that match that criteria which are Restaurant One Seven, The Oak Bistro, The Copper Kettle, and Cotto. Which one would you be interested in? Sentence12: There are 5 nighclubs in the centre. Would you like more information on them? Sentence13: I have about 7 different options for you. Do you have a certain price range in mind? Sentence14: I'd also like a nightclub to go to in the same area as the restaurant. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System