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: Acorn Guest House is located at 154 Chesterton Road. Sentence2: How many stars does the Acorn Guest House have? Sentence3: No, unfortunately there are no guest houses that offer free parking but do not offer free internet. Sentence4: Is there any other guesthouses that don't have internet included? Sentence5: Okay, what about one that does have internet? Sentence6: I am also looking for a train that leaves after 14:15. Sentence7: What is the address of the Acorn? Sentence8: I think your best bet is Acorn Guest House. They fulfill your need for free parking and are in the north. Sentence9: Sure thing, Reference number is : A4C2KF23 . Anything else I can help you with? Sentence10: I need a guesthouse, free parking included. Sentence11: ok, the acorn guesthouse is a great place. Located in the north and is moderately priced. They offer free parking and internet. Sentence12: The Acorn Guest House is rated 4 stars. Sentence13: Could you please book that train for 5 people and give me the reference number. Sentence14: It was a pleasure to assist you. Thanks for using our service. Have a great day. Goodbye. Sentence15: That will be all, thank you. Sentence16: TR2420 train leaves at 15:00, may I book this for you? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User