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: TR5499 leaves Stansted Airport at 14:24 and arrives in Cambridge at 14:52. Would that work for you? Sentence2: There are 33 restaurants that fit your requirements, is there a type of cuisine you are interested in? Sentence3: I need to arrive by 15:15, can you give me a train ID matching that and a departure time? Sentence4: The restaurant should serve seafood. Sentence5: i have found 19 trains. what time do you wish to depart? Sentence6: What time would you like me to book the reservation? Sentence7: That is everything I needed to know. Thanks for your help! Sentence8: Loch Fyne is an expensive seafood restaurant in the centre. Should I book it? Sentence9: Please book the reservation for 18:30. Sentence10: Thanks. Now I need to find a train from stansted airport to cambridge on wednesday. Sentence11: The booking was successful. The reference number is JX5WC64A . Sentence12: I am looking for an expensive restaurant in the centre at Cambridge. Sentence13: Okay I am glad to be of service. Thanks for calling. Sentence14: Yes please. Can you book it for 3 people on Wednesday? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User