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'll be leaving from stansted airport and heading to cambridge. I need to get there by 19:30. Sentence2: No problem. We have 404 such entries. Where will you be departing from and going to? Sentence3: Is that in the north? It sounds like what I'm looking for if it's in that area. Sentence4: Certainly, the train ID is TR5433 and it departs at 18:24. The total travel time is 28 minutes. Can I help with anything else? Sentence5: The latest train you can take is the 18:24 train out of stansted, which arrives in cambridge at 18:52. Would you like took book a seat? Sentence6: I have 4 Guesthouses in the North area. They each are 4 stars, include FREE parking, and WIFI. Would you like me to book one? Sentence7: Actually, I'd like the hotel to include free parking if possible, but it doesn't need to have free wifi. I'd like to stay on the north end of town. Sentence8: Yes, I need of for seven people starting today and lasting five nights. Sentence9: Would you like to stay at the worth house? It's a guesthouse in the north, in the cheap price range, has 4 stars, wifi and parking. Sentence10: I am also looking for a hotel. I would like it to be a four star that includes wi-fi. Sentence11: Yes, I was wondering if you could assist me with finding a train for Thursday. Sentence12: No, but could you give me the train ID, departure time, and travel time of that train? Sentence13: Goodbye, have a good day. Sentence14: We have 21 hotels of that type. Is there a location or price range you would prefer? Sentence15: The Acorn guesthouse is able to accommodate you. Your reference number is 7RVELIR8 . Sentence16: Thanks for you're help! That'll be all. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User