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: Hi. I am Robert Turner. 
 agent: Hello Robert Turner, what can I do for you? 
 customer: We are planning for family tour to Oakland. Can you book a ticket from JFK to OAK? 
 agent: Sure, we are here to help you for booking. May I know your journey dates? 
 customer: My journey dates are from 01/05 to 01/07. 
 agent: Ok, please wait for a moment. 
 customer: Make sure that price limit should not exceed 5000 and connection limit must be 1. 
 agent: I will check the availability of flight and notify you. 
 customer: Ok. 
 agent: Thanks for being hold, we are happy to say that we found a 1021 Spirit airline that matches to your criterion. 
 customer: Book the ticket. 
 agent: The fare of this airline is 100 with one connection. Ok, the booking has been done. 
 customer: Thank you for your help. 
 agent: Thanks for reaching us. Have a nice day.
A:
book