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: When are you planning to travel? Sentence2: Yes, the 18:40 would work, how much does it cost? Sentence3: The earliest train after that time is TR7696 that leaves at 18:40 and arrives at the airport by 19:08. Would that work? Or, I have later trains. Sentence4: The price per ticket is 10.10 pounds. Would you like me to go ahead and book it for you? If so, for how many tickets? Sentence5: enjoy your stay in cambridge! Sentence6: Yes, thank you. Sentence7: That's OK, no thank you. Are there any nightclubs in town? Sentence8: Monday. I need to leave after 18:15 Sentence9: Yes there's 6 in the centre and 1 in the south. Sentence10: No thank you that is all. Sentence11: What's the postcode for the one in the south? Sentence12: Please help me book a train from Cambridge to Stanstead Airport. Sentence13: Is there anything else I can do for you? Sentence14: The nightclub called the Place is located at the postcode cb23hg. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System