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 get me 5 tickets for that Sentence2: I need to leave on saturday and arrive by 18:30 Sentence3: I'd love to have some Indian food. Sentence4: TR0545 can get you there by 16:43, would you like me to book a ticket? Sentence5: Yes, please! Can you make a reservation at your favorite for the same group of people at 21:00 on the same day as the train? Sentence6: There are 70 results. Is there a certain day and time you'd like to leave? Sentence7: enjoy your stay in cambridge Sentence8: There are 9 restaurants in the west that are considered expensive. You have a choice of Thai, Indian, British or European. Which do you prefer? Sentence9: Thank you very much. Sentence10: I need a train from stevenage to cambridge Sentence11: Booking was successful, the total fee is 51.2 GBP payable at the station . Reference number is : DZN9X4BU . Is there anything else I can do for you? Sentence12: Yes, I'm also looking for an expensive restaurant in the west. Sentence13: Ok, I've booked you and your guests for Saturday at Tandoori Palace, 68 Histon Road Chesterton, Reference # 170ZCNIC . Sentence14: There are 5 Indian restaurants that meet your needs. Would you like for me to make a reservation for you? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System