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: No but I'd like it to include free wifi and be in some kind of guesthouse. Sentence2: Can you give me information on the one arriving in Cambridge closest to 20:00. I just need the train ID and price. Thanks Sentence3: The closest arrival time is 19:52, the trainID is TR4883 and the cost is 3.52 pounds. Sentence4: I need to find a place to stay with four stars in a moderate price range. Sentence5: I need to arrive in cambridge by 20:00 please. Sentence6: I'm happy to have assisted you! Thank you for using the Cambridge TownInfo centre. Have a nice day! Sentence7: I have 11 different options available. Did you have an area in mind for your stay? Sentence8: Possibly. I'd like their address, and to know if they have free parking. Sentence9: OK, and what time will you be traveling? Sentence10: Great. Thank you very much for your help. That is all for today. Sentence11: There are 11 hotels that match your search. Would the acorn guest house in the north work for you? Sentence12: Great! Also, I need to take a train from ely on Sunday. Sentence13: Alright, I have eight trains of that type. They leave 35 minutes after the hour every hour, starting at 5:35 and running until 19:35. Would you like to book? Sentence14: They do offer free parking. Their address is 154 chesterton road. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User