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 3 for you to choose from. Two of them are moderately priced, and one is cheap. All offer free wifi and parking. Do you have a preference on price? Sentence2: Okay, how many stars do they have? Sentence3: Not at this time. I'll talk it over with my wife. Can you just give me the name of the moderate one? Sentence4: Would you like me to book either of them? Sentence5: That sounds good. Thank you. Sentence6: No, that's all. Sentence7: There are two moderately-priced guesthouses to choose from. One is The Aylesbray Lodge and the other is The Bridge. Sentence8: Hey! I'm coming into town and I need a guesthouse style of lodging on the south of town. Sentence9: Have a nice day, goodbye. Sentence10: Aylesbray Lodge has 4 stars, and the Bridge Guest House has 3. Sentence11: Ok, The Bridge House is only 3 stars, and the Aylesbray is 4, if that makes a difference to your wife. Can I help with anything else? Sentence12: No, we're going to talk it over and reserve at a later date. Thanks for your help though. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User