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 just need to arrive by 19:15, so could you find one closer to that time, please? Sentence2: no, that's it. thanks for your help! Sentence3: You're welcome, have a great day. Sentence4: The next train to be leaving from Stansted Airport is at 5:24 on Friday. It will get to Cambridge at 5:52. Sentence5: Could you tell me how long that train ride is? Sentence6: Are there any swimming pools in the area? Sentence7: Train TR1008 will arrive by 08:52. Should I get you tickets for that one? Sentence8: There's a train that leaves Stansted airport at 08:24 and gets to Cambridge at 8:52. I can look up an earlier or later one if you prefer Sentence9: Any trains from stansted airport? Sentence10: That ride takes exactly 28 minutes. Sentence11: There is one pool called the Parkside Pools on Gonville place. Will that work? Sentence12: The entrance fee is not available online at the moment. The phone number is 01223446100 if you'd like to call and check. Can I help you with anything else? Sentence13: Think I will take a dip there, can you let me know if there is an entrance fee? Sentence14: I need a train that leaves on Sunday. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User