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: Possibly, what time does it arrive at London Liverpool Street? Sentence2: What is your destination? Sentence3: Thanks so much for using Cambridge TownInfo centre today! Sentence4: I was able to find it, would you like to book a room there? Sentence5: I'm headed to London Liverpool Street from Cambridge. Sentence6: It takes the TR7057 88 minutes to go from Cambridge to London Liverpool Street. Sentence7: Thank you, I think that is it, enjoy your day! Sentence8: There are 8 trains fitting your criteria. TR7057 leaves Cambridge on Friday at 09:59. Would you like to book this train? Sentence9: No problem! Is there anything else I can help you with? Sentence10: Great, thanks. I am also looking to book a train for this Friday. I am hoping to leave after 08:45. Sentence11: Thank you for your help, I'll pick up tickets at the station. Sentence12: All right, you have a reservation beginning Sunday for 5 nights for a party of 8 at Rosa's. Your reference number is 8E3J63R1 . Sentence13: I'm looking for Rosa's Bed and Breakfast in Cambridge. Sentence14: What's the travel time on that trip? Sentence15: Yes please, for 5 nights starting Sunday, there will be 8 people in my party. Sentence16: The 9:59 train leaves Cambridge and arrives at London Liverpool Street at 11:27. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User