Q: 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
customer: Hello, I am Jonathan Wilson. 
 agent: Hello, how may I help you? 
 customer: I would like to travel from OAK to PHL. Can you please help me to book a ticket to launch a new product in Philadelphia? 
 agent: Sure, please specify your journey dates? 
 customer: My travelling dates will be on 04/11 to 04/13. 
 agent: Do you need any other requirements? 
 customer: I need a connecting flight. 
 agent: We found a flight with Southwest airlines, flight number is 1019 with one connection and price is 100. 
 customer: You can proceed to booking. 
 agent: Ok, your dates has been reserved. 
 customer: Thank you. 
 agent: Thank you for choosing us.
A:
book