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: the TR4226 arrives at 14:07, would you like me to book 5 tickets for you? Sentence2: Yes, just the entrance fee, postcode and phone number. Sentence3: Please find a concerthall in the west for me. Sentence4: Thanks and have a great day. Goodbye. Sentence5: Yes, please. May I get the reference number? Sentence6: Maybe I confused you. Sorry. I need to leave Bishops Stortford on Wednesday, and arrive in Cambridge by 15:15. Sentence7: There are ten different trains to choose from. Do you have a specific time in mind? Sentence8: What other days are there? Sentence9: I need to arrive by 15:15 and will need to book for 5 people. Sentence10: There are many options. Where would you like to depart from? Sentence11: That's ok. I'll call for it. Thanks again. Bye for now. Sentence12: Unfortunately no train matches you request. Would you like a different day and time? Sentence13: I want to depart from Bishops Stortford. Sentence14: Sorry, I don't see any days for your search. Sentence15: The only concerthall in Cambridge is The Man on the Moon, located in the centre. Would you like more information? Sentence16: Their phone number is 01223474144 and postcode is cb12lf. Unfortunately there is no info on the entrance fee. Sentence17: Your train has been booked. The total fee is 50.5 GBP payable at the station. Your reference number is OWNJ1GL8 . Can I be of further assistance? Sentence18: Hey trying to locate a train that would leave on Wednesday and arrive in Cambridge. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User