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 one in the south is considered cheap Sentence2: it is in cheap price range Sentence3: No that's all I need today. Sentence4: I was able to make a booking for you. Your reference number is J7NF1FG6 . Sentence5: Nandos serves Portuguese food. There's one in South Cambridge and one in the central area. Would you like me to make a reservation for you? Sentence6: Have a great day Sentence7: I don't have any 0 star hotels with parking available but I do have a couple of guesthouses available. Do you have a location preference? Sentence8: Is there anything else I can help with today? Sentence9: What about a moderately priced 4 star hotel with free parking? Sentence10: ok I need a place to eat that serves portuguese food Sentence11: Ok great. Thanks for the help. Sentence12: I can make a reservation for Nandos in the south. How many in your party, what day and what time do you want? Sentence13: So this is probably impossible but can you find me a 0-star hotel that offers free parking? Sentence14: No, just tell me what kind of prices the one in the south charges. Sentence15: Well, I have the Archway House that would fit your needs. It's located in the North at 52 Gilbert Rd. Can I book this for you? Sentence16: Unfortunately there are no moderately priced 4 star hotels with free parking. Could I interest you in either a 2 star moderately priced hotel, or 4 star guest house? Sentence17: No, but I would like place in the moderate price range. Sentence18: Okay, great. I'll go there. Sentence19: Thanks, but I don't need a reservation. Can you tell me their price range please? Sentence20: I think I'll go with my original 0 star. Archway House sounds fine. Can you reserve 3 nights arriving on Thursday for 3 people please? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User