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: Great that's all that I needed for today. Sentence2: Thanks! Could you also help me find somewhere cheap to stay? Sentence3: Than you very much! Sentence4: A guesthouse will work out better and I need free parking too. Sentence5: I have several options for you, did you want to stay in a particular area? Sentence6: We have trains that go from early morning to late night, what is the route you will be taking and on what day? Sentence7: I'm looking for a train, but I don't want to have to get up too early. There's something that leaves after 8:15, right? Sentence8: book for 2 people and get me the reference number Sentence9: Alright, have a lovely day. Sentence10: I have the TR0797 departing at 08:40 and arrives at 09:08. Would you like me to book that for you? Sentence11: I need to get to Stansted Airport on Monday. Sentence12: Thank you, you too. Sentence13: I have 10 places you could stay. Would you prefer a guesthouse or hotel? Sentence14: Sure. The two of us want to stay for two nights starting Saturday. Sentence15: Sure! The reference number for this booking is QA51IFDT and the total fee with be 20.2 GBP payable at the station. Can I assist you with anything else? Sentence16: The area doesn't matter but I do need free wifi, please. Sentence17: Booking was successful.Reference number is : AVJ0CKBP . anything else? Sentence18: alexander bed and breakfast is a very nice place and it fits your needs. Shall I book it ? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System