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: OK, the TR4117 arrives at 12:52. Would you like to book that train? Sentence2: No. That is all. Thanks. Sentence3: Thanks for using the help desk! Sentence4: The allenbell is a guesthouse located in the east. It is a cheap 4 star hotel with free parking and internet. Sentence5: Thanks so much, Can you book it for 1 person for 4 nights starting from the same day? Sentence6: TR4117 is 10.10 pounds per ticket and the duration of the trip is 28 minutes. You would leave at 12:24 and arrive in Cambridge at 12:52. Sentence7: I'm looking for a train leaving stansted airport on tuesday. Sentence8: I have made your reservation for Tuesday, with reference #OV9QI79D . Can I help you with anything else? Sentence9: Thank you! I'm also looking for a hotel named the Allenbell. Can you help me with that? Sentence10: I am going to Cambridge and i plan to depart from stansted airport and i need a train schedule from stansted airport that will get to Cambridge by 13:30 Tuesday. Sentence11: Not yet but I do need a price and travel time. Sentence12: What is your destination and what time would you like to depart from stansted airport? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System