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: On what day will you be checking in, for how long, and for how many people? Sentence2: I have one leaving at 22:19. Would you like to book it? Sentence3: I don't feel comfortable giving that to you. I'll book on my own. Can you just give me info on a place to stay? Sentence4: The train ID is TR8054. May i have your details (Name, Phone number, ID, email) so i can go ahead and make the booking for you. Sentence5: The first train leaves at 21:48. Sentence6: Yes and Can you book it for me and get a reference number ? Sentence7: Okay, I have the alpha-milton guest house in the north area. Will that work for you? Sentence8: I am planning my trip to Cambridge and need a train leaving Peterborough after 21:45. Sentence9: Certainly. What area of town would you like to stay in? Sentence10: That won't work for me. When does the next one leave on Tuesday? Sentence11: I need a room. Do not need wifi or parking. Sentence12: Yes that time works. Please book it. What is the train ID? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System