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 would really like to stay in the east of town, and preferably an expensive guesthouse if one is available. Sentence2: There are no expensively priced guesthouses in that area, but there are 2 moderately priced ones and 3 cheap ones. Would one of those suit you? Sentence3: I can help you find a nice place to stay. First, did you have a particular area of town you were interested in? Sentence4: Sure! Where will you be departing from? Would you like to depart at a certain time? Sentence5: I'd like to leave from Stevenage and go to Cambridge, it should arrive by 8:45 on the same day as my hotel booking. Sentence6: Booked! Reference number: WQL1WG7F . Sentence7: Thank you! I also need a train that arrives by 08:45 Sentence8: Thanks. I will definitely use your service again. Sentence9: Can you suggest one of the cheap ones? Sentence10: Yes. For one person for 5 nights starting from thursday. Sentence11: I can recommend autumn house at 710 Newmarket Rd. Would you like me to book this for you? Sentence12: You're welcome. Thank you for calling. Good bye. Sentence13: Hello, we're planning on staying in Cambridge and need lodging. We're looking for a guesthouse which has all amenities etc. Price is no problem. Sentence14: I have train TR1044 leaving stevenage at 7:54 and arriving in cambridge 8:43. Would you like me to book that? Sentence15: Thank you for using our service. Have a great day. Sentence16: You're welcome. Is there anything else I could help you with? Sentence17: No, I'm not sure I need the train yet. Thanks for the info! Sentence18: No, that's all I needed. Thanks for your time! Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System