You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: There are several options meeting your criteria. What time would you prefer to depart? Sentence2: I am looking for information on the Scott Polar Museum. Sentence3: My pleasure, thank you for using Cambridge TownInfo centre. Sentence4: Have a great day. Sentence5: Where will you be departing from and do you have a particular day you wish to leave? Sentence6: No that is all. Thank you very much. Sentence7: Scott Polar Museum is in the centre. Phone number is 01223336540. Postcode is cb21er, address is lensfield road and entrance fee is free. Anything else I can help you with today? Sentence8: That will be all for now.Thank you very much Sentence9: TR0033 is the latest train that meets your requirements and leaves norwich at 15:16. If you want to catch an earlier train, they depart hourly. Anything else I can do? Sentence10: Thank you for your help! Sentence11: I want to depart Wednesday from Norwich Sentence12: It doesn't matter. I just need the travel time, departure time, and train ID. Sentence13: You are very welcome. Thank you for using the Cambridge Towninfo Centre! We appreciate your business, have a great a day. Sentence14: Sorry, I had another concern. I'm looking for a train that goes to Cambridge and arrives by 17:15 Question: Who has spoken the sentence 13? (A) User (B) System
A:
Answer: (B) System