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: Are you looking for an attraction to go to? Or are you looking for a restaurant or a hotel or something else? I need more information. Sentence2: I don't know. Can you recommend your favorite thing to do? Sentence3: Yellow Lexus, 07263691151. Is there anything else? Sentence4: I want to find somewhere to go in the centre. Sentence5: That will be all, thank you. Sentence6: cambridge university botanic gardens post code is cb21jf. Sentence7: Ok, please also book me a taxi from the restaurant at 05:30 and can I have a description and contact information for the taxi? Thanks. Sentence8: May i know the type of attraction you will prefer. We have architecture, boat, cinema, college, nightclub, museum and much more? Sentence9: Okay, great. I'll also need to know the postcode, if possible? Sentence10: I enjoy the cambridge university botanic gardens this time of year. They have an entrance fee of 4 pounds. Sentence11: I also need to find restaurant serving modern European food. Sentence12: Assuming you have no further criteria, the Galleria is a great restaurant on 33 Bridge Street. Sentence13: Thank you for calling. I hope you enjoy your trip. Goodbye. Sentence14: Yes, attractions to visit. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System