In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details
Q: customer: Hello. 
 agent: Hello. 
 customer: I am Stephanie Evans. 
 agent: In what way can I support you now? 
 customer: I am an artist and would like to visit one of the best museum to enjoy by watching different types of arts in Phoenix. Will you please aid me in booking a flight ticket? 
 agent: Sure, can I have your scheduled dates of journey? 
 customer: My scheduled dates are 01/28 and 01/30. 
 agent: Let me know your airport codes to book a ticket. 
 customer: My airport codes are from MA-BOS to AZ-PHX. 
 agent: You have a flight with 1 connection of price 100 in Southwest airline of 1000 flight. 
 customer: You can proceed. 
 agent: Sure, ticket is reserved. 
 customer: Thank you for your assistance. 
 agent: Thank you.
A:
book