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 suppose, please give me a price and train ID. Sentence2: I would be happy to do that. I just need to know what day you would like your reservation to start. Sentence3: Which day would you like the reservation to start? Sentence4: Before we continue, I need the reference number for my hotel booking. Sentence5: The train id is TR1699 and the price is 12.80 pounds. How many tickets would you like to purchase? Sentence6: The closest train would be TR1699 departing Stevenage at 21:54 arriving Cambridge 22:43. The ticket would be 12.80 GBP. Shall I book this for you? Sentence7: 1 ticket for train ID TR1699 from stevenage to cambridge at 21:54 has been booked. Your reference number is W6J8TUAC . Have a nice day. Sentence8: Can you tell me the hotels that meet that criteria first? I need a 4-star guesthouse with parking. Sentence9: monday, please Sentence10: So is there any train on Monday? Sentence11: One ticket, please. Sentence12: No that will be all for today. Thank You! Sentence13: Are there any trains from stevenage to cambridge on Monday leaving at 21:00? That is what I'd prefer. Sentence14: It looks like there are only trains on Friday and Saturday from Stevenage. Would another day do? Sentence15: Hi I would like to find a place to stay that has a guesthouse and free parking. Sentence16: Also on Monday I am looking for a train destined for Cambridge. I need to depart at 21:00 from the Stevenage. Sentence17: Is there anything else I can do for you? Sentence18: Reference number is : DB9SPLT7 . Sentence19: Acorn Guest House has all the criteria you need. Would you like me to book that? Sentence20: Your booking was successful for 4 people at the Acorn Guest House, staying 2 nights starting Monday. Your reference number is : DB9SPLT7 . Is there anything else I can do today? Sentence21: Book it for 4 people staying for 2 nights and give me the reference number. Sentence22: There are two. One leaving at 21:54 and the other leaving at 23:54. Question: Who has spoken the sentence 21? (A) User (B) System
Output: 


Answer: (B) System