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: If it arrives by 17:55, then yes, please book 1 seat for me. Sentence2: Yes I have the 17:55. May I help you with anything else? Sentence3: I'm looking for a train in Cambridge that will arrive by 18:30 Sentence4: I have about 5 different options for you. Most have free admission, except one. Might I suggest the All Saints Church on Jesus Lane. It has free admission. Sentence5: Are you leaving Cambridge or going to Cambridge? Better yet, what is your departure city and destination? Sentence6: I'm departing from cambridge and would like to go to norwich on a monday. Sentence7: Can I get the postcode for that please? Sentence8: You're very welcome. I do hope that you enjoy your trip. Goodbye. Sentence9: Fantastic, thanks. I'd also like to find an architecture attraction in the centre of town, please. Sentence10: all saints church's postcode is cb58bs. Sentence11: I was able to book TR8504 leaving cambridge at 16:36 arriving norwich at 17:55. The total fee is 17.6 GBP and your reference is P5JNVZHA . Sentence12: Thank you! That is all the help I need today. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System