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: Unfortunately, none of them are 1 star rated. I have one that is 0 stars, a 3 star one, and two 4 star ones. Sentence2: The train ID is TR9589, price is 17.60 pounds, and travel time is 79 minutes. Shall I book it for you? Sentence3: I am looking for a train that should depart norwich and leave on Friday. Sentence4: Sure, I'd like to leave for cambridge after 19:00. Sentence5: The El Shaddai has 0 stars. Sentence6: Is that a hotel or guesthouse? If a guesthouse I'd like to book for 2 people for 1 night on Friday. Thank you. Sentence7: That's perfect. Can I have the train ID, price, and travel time please? Sentence8: I would be happy to help you find a train. Can you please confirm the destination for your travels? Sentence9: Booking system seems to be down at the moment. Should I try some place else, or would you like to try back in a little while? Sentence10: I apologize for the inconvenience. Please check back in a few to book. Have a good day. Sentence11: No, I actually wasn't ready to book anyway. Thanks so much for your help. I won't be needing anything else. Bye. Sentence12: No that's okay. I am looking for a place to stay though, somewhere in the centre and with free parking preferably. Sentence13: TR9589 leaves at 19:16 Sentence14: Are there any 0 star accomidations? Sentence15: There are 2 hotels and 2 guest houses in the centre which do you prefer? Sentence16: Yes book it for me please. Sentence17: Yes, it is a guesthouse. May I go ahead and book that for you? Sentence18: The one with 1 star, please. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System