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: I need a four star hotel. Sentence2: Not at this time. I just need the price. Sentence3: Do you have a preferred departure/arrival time? The travel time is 51 minutes and there are multiple trains. Sentence4: There is one in the price range of cheap would you like me to book that one. Sentence5: I have many 4 star hotels. Do you have a price range or area of town in mind? Sentence6: Thank you for using our system today! Sentence7: Unfortunately I need a hotel that is 4 stars with free parking. Do you have one that is not in the moderate price range? Sentence8: That's fine, thank you. I also need help with a train leaving Cambridge and going to London kings cross. Sentence9: Yes.Let`s please try for shorter number of days. Thanks. Sentence10: Would you try for 2 nights instead? And, what is the name of the hotel? Sentence11: The price is 23.60 pounds. Is there anything else I can help you with? Sentence12: I just want to leave after 16:45 going from cambridge to london kings cross on thursday. Sentence13: Yes, that would be fine. 4 people, 4 nights, starting from tuesday. Sentence14: TR6628 leaves at 17:00 and arrives by 17:51, do you want me to book you? Sentence15: No, you've been a great help, thanks for your time. Sentence16: I am sorry about that. The hotel is in the cheap price range. Sentence17: Unfortunately that day is unavailable for that many days. Do you have an alternative? Sentence18: I was able to successfully book the Cambridge Belfry for two nights starting on Tuesday for four people. Your reference is BK6DS11E . Sentence19: The name is The Cambridge Belfry, but unfortunately they were not able to accommodate that reservation. Would you like to try it for a shorter number of days? Sentence20: Unfortunately, I don't have any hotels that fit that criteria. Would you consider a guesthouse in that range? Sentence21: Sorry, I did not want to book a room until I was sure of the price could you give that to me first? Sentence22: I would like it to be in the moderate price range and have free parking Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User