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 also looking for information on a restaurant called Tang Chinese. Sentence2: I am looking for a train to Cambridge on Friday that departs after 14:30. Sentence3: Yes that is a expensive chinese place located in the centre. Did you need the address or phone number? Sentence4: I'm sorry, but can you please restate your requirements for the train? Sentence5: Can you book me a table for 6 on Friday at 11:45? Sentence6: Glad to be of service. Thank you for using Cambridge TownInfo centre today! Sentence7: Yes please I would like to book it for 6 people please. Sentence8: TR3057 will be departing cambridge at 15:11 on Friday, arriving kings lynn by 15:58. Would you like to reserve a seat for this train? Sentence9: That is 6 tickets at 9.80 pounds each for a total of 58.8 GBP. Your reference number is Q1ULPR62 . Can I help you with anything else today Sentence10: Yes, I need a train from cambridge to kings lynn on friday. I'll be traveling after 14:30. Sentence11: Thank you so much for all of your help. That is all I needed for today. Sentence12: Your table for six on Friday is reserved, and your confirmation number is FZ5B6DZ5 . Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User