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: The address and the postcode are: 2 Rose Crescent City Centre cb23ll Sentence2: How about mediterranean? Sentence3: No, but I would like to have the address and postcode. Sentence4: Excellent! Thank you so much for the help! Sentence5: The gardenia fits your criteria and serves Mediterranean. Would you like me to make a reservation? Sentence6: Now I need to find a restaurant in the centre of town that is cheap. Sentence7: Alright! Enjoy your stay in Cambridge! Sentence8: The restaurant should serve Greek food. Sentence9: I am looking for places to go in Cambridge. Sentence10: The first college alphabetically is Christ's College, which is free to enter. The postcodee is CB23BU and the phone number is 0122334900 Sentence11: No, I have everything I need. Sentence12: I'm looking for a college. Will you please give me the entrance fee, postcode, and phone number? Sentence13: There are 79 places to go in my database. Can you narrow down your requirements, please? Perhaps by type or area? Sentence14: Okay I have as many as 15 choices that satisfy those criteria. Would you like to narrow it down by food type? Sentence15: You're welcome. Do you require further assistance? Sentence16: Sorry, no results returned for Greek food Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User