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: How about the Ashley Hotel? It is on the north side of town, has 2 stars, free wifi and parking, and is moderately priced. Sentence2: Is that a 2 star hotel? Sentence3: Are there any available for less than $200 a night? Sentence4: Unfortunately, the rooms are unavailable for that day and time. Can I try a shorter stay for you or possibly a different day? Sentence5: Of course! The reference number is QZYSOMAW and the address is 74 chesterton road. May I help with anything else? Sentence6: No, it has 4 stars Sentence7: Can you make a reservation for 6 people for 3 nights starting on Wednesday. Sentence8: Yes, I was able to successfully book you for two nights. Is there anything else you need? Sentence9: The only 2 star hotels are in the north or the east. Do you mind staying in one of those areas? Sentence10: Nope, that's all I need. Thanks for your help! Sentence11: Can I have the reference number and address please? Sentence12: How about for 2 nights? Sentence13: We're glad to be of service, and please do not hesitate to contact us if you need more help while you're in Cambridge! Sentence14: Yes that would be fine with me Sentence15: There are several. Alexander Bed and Breakfast is cheap and is in the Centre. Would you like me to book that? Sentence16: Let's try a hotel type with free parking in the centre of town with a star of 2. Sentence17: Are there any rooms available in hotels with free parking? Sentence18: how about for 2 nights? Sentence19: Yes. Do you have a preference for the hotel's area or price range? Sentence20: I'm sorry. I have no 2 star hotels in the center of town. However, I have some in other parts of town. Would you care to modify your search criteria? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User