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: TR1537 will be leaving at 19:35 and the ticket is 4.40 pounds. Would you like a ticket for this train? Sentence2: No, I don't need train tickets right now. Sentence3: I'm looking information about a train in Cambridge. Needs to arrive by 21:00 and leave on Tuesday. Sentence4: Not just yet. Can I get the cost and departure time? Sentence5: Yes. I am also looking for a 3 star hotel in the north. Sentence6: I have a Hamilton Lodge available in the north, with a 3 star rating. It's moderately priced. It's located at 156 Chesterton Road. Will this work for you? Sentence7: I'll be happy to assist you with finding a hotel. Would you like to get the train tickets first? Sentence8: TR1537 will arrive at 19:52. Would you like a ticket on that train? Sentence9: Where will you be traveling from and to? Sentence10: I will be going from Ely to Cambridge. Sentence11: Is it a guesthouse? I don't want to stay at a hotel. Sentence12: Yes it is. Would you like me to book that for you. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System