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: Would you like me to book that for you? Sentence2: I would like a guesthouse. The star rating doesn't matter, but the hotel should include free wifi. Sentence3: Can I help with anything else? Sentence4: I will need to leave from Ely. Sentence5: I need a train going to Cambridge and arriving by 12:45. Sentence6: There is a train departure on Friday from Ely to Cambridge that arrives by 11:52. Do you want that instead? Sentence7: Thank you. That was all I needed. Sentence8: The Acorn Guest House was successfully booked for Friday for 2 nights for 4 guests. Your Reference number is : GWZ3QLV5 . Sentence9: I would appreciate that. Is there only one option that arrives by the time I need? Sentence10: Definitely! Would you like a guesthouse or a hotel, and do you have a star rating requirement? Sentence11: Will I be able to find any moderately priced rooms to stay in in the north part of Cambridge? Sentence12: There are a number of guesthouses that fit your criteria. I would recommend the Acorn Guest House. It has a 4-star rating. Does this work for you? Sentence13: Sure, I can assist you with that. Where were you wanting to leave from? Sentence14: Can you book Acorn Guest House for 4 people for 2 nights starting friday? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System