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: I'm also looking for a train. I need to depart from cambridge and arrive by 19:15. Sentence2: Soul Tree Nightclub is nice and has a 4 pounds entrance fee. The postcode is cb23qf. Can I help with anything else? Sentence3: I'm looking for a nightclub in downtown Cambridge. Sentence4: I have several, is there a price you would like to keep entrance fee under? Sentence5: You are very welcome and have a good night. Sentence6: I would like to go to Kings Lynn on Monday. Sentence7: That's everything. Thank you. Sentence8: I don't really care. Can you suggest a place? And give me a postcode for the one you suggest please. Sentence9: There are many trains that day. I Have one that that gets in at 17:58, would you like me to book it? Sentence10: Okay, I have booked your train ticket from Cambridge to Kings Lynn. Your reference number is RX3523989 . Sentence11: There are many trains that fit your criteria. Is there a destination to narrow the search? Sentence12: That works for me. Book it for 2 people and I need the reference number. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User