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: Yes, it arrives at 05:56. Sentence2: I do not have a specific price or location in mind. Please just send me the address and phone number of an Indian restaurant. Sentence3: Thank you. That is all I needed. Sentence4: There are 22 Indian restaurants in Cambridge. Do you have a preferred price range or area in town you'd like to dine? Sentence5: Are there any later trains? Also I need to get the price, departure time, and train ID when we find a suitable one. Sentence6: The earliest train is at 5:06, do you want me to book it? Sentence7: I need a train to Peterborough on Monday. Sentence8: Okay I have chosen the Curry Prince for you, which is a very popular location. Their address is 451 Newmarket Road Fen Ditton and their telephone number is 01223566388. Sentence9: I am thinking Indian food would be perfect and in the centre. Sentence10: You are welcome. Goodbye. Sentence11: Train TR4765 leaves at 15:06 and arrives at 15:56 and costs 16.50 pounds. How many tickets would you like to book? Sentence12: Yes TR4765 departs cambridge monday at 15:06, arriving in peterborough by 15:56. How many tickets will you need? Sentence13: Yes I have trains that arrive from 5:56 to 15:24. Any preference? Sentence14: I was just looking for information for now. I do need some additional information on a place to eat though. Sentence15: What is the train ID and response of the train that arrives at 15:24? I would like to book that one. Sentence16: Does it arrive by 16:00? Sentence17: I need a train that departs from Cambridge. Does TR4765 go from Cambridge to Peterborough? Sentence18: There are 110 restaurants in the area - are you looking for a specific type of cuisine? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System