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: Downing College is located in the centre, located on Regent Street. The postcode is cb21dq. The entrance fee is free. Is there anything else I can help you with? Sentence2: I can help with that! What day would you like to depart? Sentence3: You're all set. The fee will be 35.79 GBP and you can pay at the station. Your reference number is HZ0I8VML . Do you need anything else? Sentence4: Noone in the center appears to b open. You would be more than pleased with Jesus College which is and is beautiful. Sentence5: The TR5484 leaves at 18:01 and arrives by 19:01. Will that work for you? Sentence6: No that will be all. Thanks. Good bye. Sentence7: Hey! Trying to locate a train that goes to broxbourne and would leave right after 17:45. Sentence8: Yes, I need 2 tickets. Sentence9: Yes I also need information on downing college. Sentence10: I would like to leave on Tuesday please. Sentence11: Thanks for using our services today. Glad I was able to help have a nice day. Sentence12: I'm really interested in Downing College. Can you tell me the area, address, and fee for that one? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System