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, I am looking for a train leaving Cambridge going to Norwich on Friday. Sentence2: There are 4 boat attractions. What area of town would you like? Sentence3: Not sure what area, but could you pick one for me and tell me the address and phone number? Sentence4: Booked! TR4093 is your train, reference number is 08QY408D . 105.6 is the total fee. It leaves at 18:36 and arrives at 19:55. Sentence5: There are 19 trains from Cambridge to Norwich on Friday. Is there a particular time you'd like to leave or arrive? Sentence6: Sure, Camboats is always a good bet. Their address is the plough, green end, fen ditton, and postcode is cb58sx. Can I help you with anything else today? Sentence7: Thank you, you too. Sentence8: Yes, I would like to book the one that arrives closest to 20:30. I will need tickets for 6 people. Sentence9: Have a good day. Sentence10: I'd like to leave on Friday and arrive by 20:30. Sentence11: Excellent. Have a great rest of your day! Sentence12: Alright, you have plenty of options. The first train available leaves at 5:36, and they run every hour until 18:36. Would you like to book one of these trips? Sentence13: I have everything I need. Sentence14: I am looking for places to go in town, preferably something with boats. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User