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: Sure. Do you have an area or price range in mind? Sentence2: I don't care about price range, actually. Sentence3: There are 202 entries, can you please be more specific? Sentence4: Anytime after 21:45 is good. Sentence5: I have train TR8149 leaving at 22:09,is that okay? Sentence6: I have found a train and a room that meets your specifications.It leaves at 6:09 am and travel time is 105 minutes. Sentence7: No, but parking is a necessity. Sentence8: What time would you like to leave? Sentence9: i found 10 places to stay that match your criteria. to narrow it down, which price range would you like? Sentence10: Okay, I guess that would be quite a lot of typing. How about this: I need a train leaving from Leicester sometime after 21:45 on Thursday. Sentence11: I'd prefer a guesthouse with free wifi. Can you find one in the north? Sentence12: List all thursday train times heading to cambridge. Sentence13: It is 37.80 pounds and travel time is 105 minutes. Do you need anything else? Sentence14: That is fine. Can you give me the price and travel time, please? Sentence15: I also need to find a place to stay. Sentence16: do you have specifications about star rating? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System