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: I am looking for info about a hotel called city centre north b and b. Can you help? Sentence2: That's all I need. Thank you. Sentence3: Yes I would like to book the train for 4 people and I'll need the reference number please. Sentence4: Thanks again for the help. Good bye. Sentence5: There are several what day and time do you need the train? Sentence6: Ok, I am also looking for a train from Cambridge to Bishops Stortford. Sentence7: I'll be leaving Monday after 15:30. Sentence8: I'm sorry, I gave you the wrong Train Number it is TR2530 not 2630. Ref no is : 0ES63CK2 . The total fee is 40.4 GBP payable at the station. Sentence9: No thanks. No need to book today. Can I get the price range for them though? Sentence10: Text us back if you need any further assistance. Bye-bye! Sentence11: TR2630 leaves at 17:29. Would you like for me to book the train for you? Sentence12: Okay, well you have a great day! Sentence13: It's listed as in the cheap price range. Sentence14: Yes. City Centre North B and B is a guesthouse in the north side of town, that has both free internet and parking. Do you want to book a room? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System