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: Would you like to book a table? Sentence2: Hi, I'd like to book a train to stansted airport from cambridge. Can you help? Sentence3: On Saturday. Is there a train that will arrive by 15:15? Sentence4: Absolutely. Where will you departing from? Sentence5: You're welcome. Please let me know if you need anything else. Sentence6: Sure - The Lucky Star serves Chinese food and Nandos serves Portuguese food. Do either of those sound good? Sentence7: Can you also tell me the postcode? Sentence8: Sure. The post code is cb17dy. Sentence9: There is! TR7213 leaves at 05:40 and arrive at 06:08 it is 10.10 pounds. Can I book that for you? Sentence10: Thanks for your help. Good bye. Sentence11: No need to book it. Thanks. But can you help me find a cheap restaurant in the south? Sentence12: The Lucky Star sounds good. That's all I need. Sentence13: What day would you like to leave? Sentence14: From Cambridge, which is why I asked the Cambridge TownInfo centre. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User