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: Is there a moderately priced British restaurant then? Sentence2: There is no moderately priced Indian restaurant in the centre but there are three cheap places. I would recommend The Gandhi. Would this be OK or do you want somewhere else? Sentence3: Thanks for using this service! have a nice day. Sentence4: What is the cost of a ticket? Sentence5: Thank you! That is all. Sentence6: What day do you need to travel? Sentence7: the ride is 47 minutes Sentence8: TR4440 is the train that leaves earliest at 19:11 Sentence9: Yes. There are four moderately priced British places in the centre. Would you like me to recommend one? Sentence10: I'll need to leave on Sunday. Sentence11: Restaurant one seven is what I would recommend, their phone number is 01223337766 Sentence12: Yes and can I get their phone number. Sentence13: ok thanks, byeeee Sentence14: Have a good day! Sentence15: The ticket is 9.80 pounds. Sentence16: I'm also looking for a restaurant in the city centre. Can you tell me of a moderately priced Indian place? Sentence17: I am looking for a train from kings lynn to cambridge. It should leave after 18:45. Sentence18: Can you tell me how long the trip will be? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User