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: Good bye! Enjoy! Sentence2: I recommend the Carolina Bed & Breakfast. It has free parking and wifi, and it's located at 138 Perne Road, cb13nx. Sentence3: I'd like to find something in the east, preferably with 4 stars. Sentence4: No that will be it! Thank you! Sentence5: Thank you. Good-bye. Sentence6: Thanks. I also need a guesthouse to stay in that is in the moderate price range. Sentence7: The museum of classical archaeology is located in the west at sidgwick avenue. They have a free entrance fee. Sentence8: Thank you for using our services. Have all of your needs been met today? Sentence9: i'm looking for museums in town Sentence10: None in particular can you just pick one and give me the address please? Sentence11: Hope you enjoy your stay in Cambridge! Sentence12: Here you go. Do you need anything else. 01223247015 Sentence13: Cambridge has a variety of museums in all sections of town. Let's narrow your search. Is there a part of town or a type of museum you are interested in? Sentence14: That sounds great! What's their phone number? Sentence15: Yes. That's all I need. Thanks. Sentence16: I have several guesthouses in the moderate range available. What area of town would you prefer? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System