You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: We have 19 trains that day starting at 5:16 and going by the hour, any preferred time range? Sentence2: Sure that sounds good can get a booking for 6 people at 11:30 on sunday. Sentence3: Charlie Chan is a good one. Would you like me to book it? Sentence4: Where will you travel to and from? Sentence5: Thanks for taking care of everything so quickly. Have a great afternoon! Bye. Sentence6: There is a train leaving at 6:16. Would you like me to book that for you? Sentence7: Charlie Chan is in the Centre. How about the lucky star? It's in the south. Sentence8: I'll be travelling from norwich to cambridge. Sentence9: There are six of us. Sentence10: i have train tr4202 that will arrive in cambridge by 08:35. how many tickets do you need? Sentence11: Your welcome. I am glad I was able to help. Sentence12: Is that one in the south? That's the area I'll be in. Sentence13: Thanks. I also need train tickets for Sunday. Sentence14: Anytime after 6 would be good thank you Sentence15: Ok. I have a table for 6 booked at 11:30 Sunday. The reference number is A57HXG6M . They will hold the table for 15 minutes. Sentence16: I need to be in Cambridge by 8:45. Can you book a train for that will arrive close to 8:45? Thanks. Sentence17: Booking was successful, the total fee is 84.48 GBP payable at the station .Reference number is : WPGYOY1Y . Sentence18: Hey any ideals for a cheap chines restaurant ? Question: Who has spoken the sentence 9? (A) User (B) System
A:
Answer: (B) System