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: The train from Norwich to Cambridge is about 45 minutes. Do you have a preferred departure or arrival time? Sentence2: The Cambridge Belfry is perfect for you. Would you like me to book it? Sentence3: Saturday train from Norwich please. Sentence4: Is there any other hotels that would work in that area that are 4 star? Sentence5: Great, I have booked you for acorn guest house. Your reference number is O2JPQNG5 . Sentence6: Yes, please book that for the same group of people for 4 nights the same day. Wednesday would work also, and I need the reference number. Sentence7: No, I would really like a 4-star hotel in the north area with free parking. Can you please check again? Sentence8: The best response I have to that is a train arriving at 13:35. Would you like me to book that option for you? Sentence9: Yes, for 7 people please. Sentence10: Sorry, there are only guesthouses. Sentence11: I recommend the acorn guest out. Shall I book that then. Sentence12: Unfortunately, I can't book either days for you. Sentence13: Thank you very much. That's all I need. Sentence14: I am also looking for a place to stay. I'd like a hotel with a star of 4 of course that will include free parking. Sentence15: You have been successfully booked for 7 people on Train TR2334, Reference number 01MDBEIB . It departs Norwich at 12:16. Your total cost is 98.56 and is payable at the station. Sentence16: I will book it for you,is there anything else I can do for you ? Sentence17: Yes please. I would like to arrive by 14:00. Sentence18: You are welcome, enjoy your stay Sentence19: Before you book, the hotel has to be in the north, also. Do you have a hotel meeting my needs? Sentence20: I don't have any hotels in that area that are 4 star. I do have several guesthouses. Would that work for you? Sentence21: Yes for 4 nights same group of people as the restaurant reservation and also on the same day please. Sentence22: I guess we will take a guesthouse then. Which one would you recommend? Question: Who has spoken the sentence 18? (A) User (B) System
Output: 


Answer: (A) User