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: I have TR4594, leaving at 11:29 and arriving in 12:07. Is that OK? Sentence2: Yes that works. Can you book it for 5 people and send me the reference number? Sentence3: That sounds perfect, I think that's all I need today. Thanks so much for your help. Sentence4: I need to book a train from bishops stortford to Cambridge on Saturday arriving in Cambridge before 12:30. Sentence5: Yes there is Hobsons house is in the west and has free wifi. Sentence6: Thanks! Can you also check and see what 3-star guesthouses you have? Sentence7: You're welcome, thank you for using our service! Sentence8: We are listing four guest houses. Which area of town are you looking for? Sentence9: Okay. The TR4549 leaves at 21:29. Will that suit? Sentence10: I'm sorry but there are no guesthouses that I can see on the East side of town, can I look in a different location? Sentence11: Okay, I need a hotel for same group of people for two nights starting Friday, and I'll need reference number, please. Sentence12: The east part of town, it should also include free wifi. Sentence13: Ok I have 5 tickets booked on TR4549. Your reference number is NTPYZBY4 . Sentence14: I have successfully booked the hotel for you! Your reference number is NKEKLJ0D . Can I help you with anything else? Sentence15: I actually need to leave after 20:30 on Friday. So whatever is closest to that time will be fine. Sentence16: Yes, are there any 3 star guesthouses in the west that include free wifi? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User