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: There are many options available. Would you like to narrow it down by departure time or arrival time? Sentence2: Their postcode is cb12lf and their phone is 01223474144. Can I help you with anything else today? Sentence3: I am also looking for a train from Cambridge to Peterborough on Wednesday. Can you help with that? Sentence4: What would you recommend? I just need to stay in the centre and will need to call them later to ask some questions. Sentence5: thanks for serving me! Sentence6: Sure, what type of place are you interested in? Sentence7: I'd like to leave after 21:45, if possible. I won't need to book. I'll just need the arrival time, please? Sentence8: YEah, anytime. It was my pleasure. Sentence9: There are about 44 attraction in the center but if i may know what interests you i can recommend one to you. Sentence10: There is a great concert hall in the centre called Man on the Moon. It's one of the best for visitors. They are located at 2 Norfolk Street. Sentence11: Whatever is most popular, this is my first time to cambridge and I have no idea. Sentence12: thank you once again Sentence13: Sure, the TR8574 leaves at 22:06 and arrives at 22:56. Sentence14: I'm sorry about that, I forgot to hang up. Good bye. Sentence15: Thank you for the information. Do you happen to have the postcode and phone number for the Man on the Moon? Sentence16: I would like to find places to go to in the centre of town. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User