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: Bridge Guest House is rated 3 stars. Would you like a reservation? Sentence2: Yes I was able to reserve this for you and your reference number is 2I3Y6MMY . Sentence3: The acorn guest house has free wifi and parking. It is cheap and has 4 star rating. The address is 56 saint barnabas road. Sentence4: Just for myself. Give me the travel tiem and the train ID please. Sentence5: No thank you that will be all Sentence6: How many people will that train be for? Sentence7: Thank you very much! Sentence8: That will be all thank you for your help. Sentence9: TR5285 arrives at london liverpool street at 15:27 with a total travel time of 88 minutes. Sentence10: I need a 3 star rated hotel Sentence11: I need a train on wednesday which will go to liverpool street in london. Sentence12: There are several that day. What time would you like to leave or arrive? Sentence13: Is there anything else I can help you with? Sentence14: I need a place to stay that includes free wifi and parking. Sentence15: I need to arrive by 18:30 and need to depart from Cambridge. Sentence16: book it for 6 people and 4 nights starting from monday Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User