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: Are you looking to go by train or taxi? Sentence2: We have a train leaving cambridge at 19:40 arriving at stansted airport at 20:08. Should I book seats for you? Sentence3: Happy to be of service - enjoy your day! Sentence4: What type of attraction is is? Sentence5: Train leaving cambridge going to stansted airport on wednesday anytime after 18:45 Sentence6: There is no entrance fee for the people's portraits exhibition at girton college Sentence7: Great, thanks. I also am interested in the People's portraits exhibition at the Girton College, can you tell me more about that? Sentence8: Could you tell me if they have an entrance fee? Sentence9: TR2694 leaves at 19:40 and costs 10.10 pounds Sentence10: It's located in the west of town and is free of charge. Their phone number is 01223338901. Can I help you with anything else? Sentence11: No, not at this time. I would like to know the travel time and price, please? Sentence12: people's portraits exhibition at girton college is a museum in the west area of town. Their address is girton college, huntingdon road. Can I help with anything else? Sentence13: I need to go to the stansted airport on wednesday. Sentence14: that will be all, thanks! Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User