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, please book it. I would also like the address. Sentence2: Departing from peterborough on friday. I should arrive by 10:00 Sentence3: I'd be happy to help. Can you tell me more about your trip? Where will you be departing from, and on what day would you like to travel? Sentence4: There are 8 entries that match that. Is there any time that you want to leave? Sentence5: The TR1662 leaves Peterborough at 05:19, arrives Cambridge 06:09. Care to book a ticket? Sentence6: There is one vietnamese restauarant in the area, would you like me to book that? Sentence7: And what time would you prefer to leave? Sentence8: Ok, the train was successfully booked. The total fee is 132 GBP payable at the station. Your reference number is: AYILO5E4 Sentence9: I am also looking for a restaurant in the west and in the cheap price range that serves korean food. Sentence10: You're welcome! Have a great day! Sentence11: Doesn't matter. Just pick one. Sentence12: I would like to arrive by 10:00 Sentence13: No thats all i wanted thank you Sentence14: Yes. Actually, I would like to book 8 tickets for that train, please. Sentence15: I just needed that info. Thank you. Sentence16: I need some help finding a train to Cambridge. Sentence17: There are no establishments that fit your specifications, unfortunately. Would you like to search for a different type of cuisine, or a different price range? Sentence18: The address is 17 Magdalene Street City Centre. How many people people and for what day and time? Sentence19: Is there anything else I can help you with today? Sentence20: Why don't you try vietnamese food. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System