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, that's ok. I just wanted to know the arrival time. Thanks. Sentence2: No, that sounds great! I also need to travel by train from Cambridge to Peterborough. Sentence3: thank you and enjoy your stay! Sentence4: To clarify, you need to leave cambridge by train to peterborough? I can help you with that. What day and time? Sentence5: I'm looking for a museum to visit. Sentence6: I have 23 to choose from. Do you have a preference on location to help narrow the search? Sentence7: Well, museum of archaelogy and anthropology is located at university of cambridge, downing street, cb23dz, centre. Would you like another musuem? Sentence8: I need to leave on Friday sometime after 18:00. Sentence9: I have a few options, the earliest leaves at Cambridge at 18:06 and arrives in Peterborough at 18:56. Tickets are available, would you like to book? Sentence10: 23? I had no idea! I was looking for postcodes, areas and addresses. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System