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: There are many hotels that match your criteria. Which area of town would you like to stay in? Sentence2: I am sorry, there are not 5 stars available. Sentence3: Yes, the alexander bread and breakfast is a 4 star guesthouse in the centre. Would you like me to book you a room? Sentence4: That is all I need for the time being. Thank you so much for the help. Sentence5: Yes, both free wifi and parking is available at this location. Sentence6: area of town close to public transportation Sentence7: Thank you, could I get the postal code to this hotel, please? Sentence8: Yes, but only if they offer free parking. And free wifi. Do they? Sentence9: Okay have a great day! Sentence10: Unfortunately Ashley hotel is only 2 stars. There are no 4 star hotels from what I can see. Would you like me to search for 3 star hotels or 5 star? Sentence11: Ashley hotel has free parking, would you like a reservation? Sentence12: The postcode is cb12de. Shall I book a room for you? Sentence13: Do you have any 4 star guesthouses available instead? Sentence14: Then, that narrows down to 3 hotels in the centre of town. Do you prefer expensive or moderate price range? Sentence15: I am looking for a place to stay. The hotel should include free wifi, Sentence16: Oh, I'm sorry, I also want to make sure it's got a 4 star rating, at least. Could you confirm that for me please? Sentence17: Well, I'm not sure what I should so. I guess I should go with the two star place. Sentence18: How about a three star hotel? I have two that would match your description. Sentence19: I'm not picky. It needs to have free parking, though. Sentence20: Yes, can you search for a 5 star please? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System