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: There are three: Pizza Hut City Centre, Ask, and Zizzi Cambridge. Would you like to make a reservation at any of these? Sentence2: How many tickets will you be needing? Sentence3: the price is 4.40 pounds Sentence4: I'm trying to plan a trip there. I need to find a cheap restaurant. Sentence5: Just one ticket, please! Sentence6: Before I book anything, what is the price? Sentence7: No, I would like an Italian place in the centre. Sentence8: The price is 4.40 pounds. Sentence9: Thank you for contacting Cambridge TownInfo centre. I hope you have a pleasant trip! Goodbye! Sentence10: The TR4447 leaves at 15:50 and it's a 17 minute ride, arriving at 16:07. Should I book it for you? Sentence11: I am also looking for a train departing from cambridge on tuesday, and arriving at ely by 17:15. Sentence12: Ask sounds good. What's the postcode? Sentence13: Thanks for your help Sentence14: Thank you, please book me. Sentence15: Would you like chinese or asian? Charlie chan serves chinese and is on the cheap side. Sentence16: I think that is all I need for today. Thank you. Sentence17: Congratulations! Your booking was successful and your reference number is SED9S4BH . Sentence18: The train arriving closest to 17:15 is TR4447 which arrives at 16:07. Would you like for me to book that for you? Sentence19: Before I book anything can you give me the price? Sentence20: You're more than welcome. Can I help you with anything else? Sentence21: The postcode is cb21uf, will that be all? Sentence22: How long does the train take to get to Ely? And when, precisely, does it leave? Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System