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: Yes, it departs from Cambridge Sentence2: The TR7075 meets your criteria. It leaves at 5:00. Would you like to make a booking? Sentence3: Does that train depart from Cambridge? Sentence4: As early as possible in the morning. Sentence5: Why did I ask this? Of course it would be cambridge Sorry, my mistake. Please book me for 1 person and I need a reference number. Sentence6: Your total is 23.6 GBP, which you will pay at the station. Your Reference number is : PQ7PVOTI . Sentence7: No how about you pick on and give me the entrance fee if any and the phone number please Sentence8: The museum of classical archaeology has free admission and its phone number is 01223335153. Do you need anything else? Sentence9: Are there any museums you can recommend? Sentence10: You are very welcome! Safe travels! Sentence11: Well, there are 23 museums to choose from. If you give me a specific area I can narrow down the choices. Sentence12: Wonderful, thanks for your help today. Sentence13: Great I'm also looking to travel to london kings cross on monday by train Sentence14: Did you have any preference for departure or arrival times? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System