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: There are 5 trains meeting that criteria. Would you like me to book you a ticket? Sentence2: Can you please tell me what your destination is for that trip? Sentence3: Thank you for contacting the help desk. Please, if you have any more questions, do not hesitate to ask. Sentence4: That's perfect. I'd like to book that restaurant for just myself at 10:00 on the same day. Could I get the reference number as well, please? Sentence5: How about Portuguese cuisine at Nandos? Would you like any more information about them or assistance booking a reservation? Sentence6: Yes, I would like to book the ticket now, could I please have the train ID? Sentence7: I would like to depart from Cambridge and arrive at Stevenage, please. Sentence8: I can take care of that myself. Can you also help me find a place to dine in the south, priced cheaply please. Sentence9: OK, you have a table for 1 at 10:00 on Saturday at Nandos. Your reference number is 3JRN2T9Y . Can I help with anything else today? Sentence10: I am all set. Thanks! Sentence11: The train ID is TR8813, how many tickets would you like to book? Sentence12: I need a train that leaves after 13:30 saturday afternoon please. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System