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: Okay. I hope you enjoy your stay! Let us know if we can be of further help. Sentence2: Not really. Can I just have the postcode and phone number for your favorite place? Sentence3: Great. Thanks. That is all. Sentence4: Thank you. Are there any expensive restaurants in the town centre? Sentence5: the tr7195 will get you there by 12:08 how many tickets please? Sentence6: kymmoy is the best! their phone number is 01223311911 and postcode is cb12as Sentence7: Well, first, what is the departure time, price and travel time? It sounds like it will work. Sentence8: I need to find a train that will arrive cambridge by 13:45 on friday Sentence9: I'm departing from cambridge and want to go to birmingham new street Sentence10: Sorry, that was the TR6668, not TR7195, arrives by 12:44, duration of the trip is 163 minutes and the price is 75.10 pounds. Sentence11: sure, where are you departing from? Sentence12: There are a variety of options in that area. Is there a particular type of food that you would like? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System