Given the task definition, example input & output, solve the new input case.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Example: 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
The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

New input case for you: Sentence1: The arrival time of the train TR9937 from cambridge to norwich will be same Thursday by 22:55. Is that okay with you? Sentence2: ok, the TR9937 leaves at 21:36 Sentence3: How many tickets do you need? Sentence4: i am also looking for a guest house called a and b guest house. Sentence5: The A and B Guesthouse is a moderately priced 4 star guesthouse in the east. It has free internet, but no parking. Would you like me to book it for you? Sentence6: sure thing, they are located at 124 tension road Sentence7: Is there anything else I can assist you with today? Sentence8: This trip is for 79 minutes and costs 17.60 pounds. Would you like me to book this for you? Sentence9: What is the total travel time for this trip? Sentence10: Okay great. Thanks for calling. Sentence11: I need a train to Norwich, leaving after 21:30. Sentence12: No, that is all I need today. Thank you. Sentence13: I'll be leaving from Cambridge Sentence14: Yes if you could book it that would be great. Sentence15: OK! Do you have all the information you need? Sentence16: I just need the address. Sentence17: Great, thanks so much! Sentence18: On what day will you be traveling on? Sentence19: I am leaving on Thursday. Sentence20: Where are you departing from please? Sentence21: What would be the arrival time of that train? Sentence22: I don't need any reservations today just information. Question: Who has spoken the sentence 17? (A) User (B) System
Output:
Answer: (B) System