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. 
 agent: Hello. How may I help you out? 
 customer: I want to attend a seminar on spirituality, could you book my ticket from LAX to DFW? 
 agent: Sure, I will help you in booking the ticket. May I know your travelling dates please? 
 customer: My itinerary dates are Feb 18 and Feb 20. 
 agent: Can I know your name please? 
 customer: Eric Baker here. 
 agent: Do you need any specifications in airlines? 
 customer: No. 
 agent: Can I know your connection limit? 
 customer: I need a connecting flight. 
 agent: There is a flight with connection 1 and price 100 with flight number 1001, can I proceed? 
 customer: I want to depart in the evening. 
 agent: Your departure time is 22:00 hours. Can I proceed? 
 customer: Please book my ticket. 
 agent: Ok, your ticket has been booked with flight number 1013. 
 customer: Thank you for assisting me. 
 agent: Thank you for reaching us.
A:
book