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: Hey, I need a place to stay with free wifi and free parking. Sentence2: I will be happy to book it for you! How many people will be staying? Sentence3: Four people. Thanks. Sentence4: I have several options to offer you, is there an area of town, or price range you'd like? Sentence5: You're welcome. If you need anything else please let us know. Sentence6: Thanks! I really don't care about the area. I need stay in a guesthouse that has free wifi and parking. Sentence7: That sounds nice. Can you get it for four nights starting Thursday? Sentence8: Thanks so much. That is all I need. Bye. Sentence9: I don't mind about the price but I want something with 4 stars . Sentence10: How about the Archway House? it is moderately priced in the north. Sentence11: In order to try to narrow down your options, do you prefer a cheaper place or something moderately priced? Sentence12: I've book the hotel for you for 4 people on Thursday. The reference number is QMOZPFHQ . Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System