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: Myself Gregory Allen. 
 agent: My job is to assist you. May I know your concern please? 
 customer: Can you please book a flight ticket from EWR to LAS locations? 
 agent: Please let me know your travel dates to book? 
 customer: My travelling dates are from 04/20 and 04/22. 
 agent: There is a connecting flight with price 100. Can I book it now? 
 customer: Please proceed with it. 
 agent: Ok, there flight ticket is been booked and the flight number 1013. 
 customer: Thank you so much.
A:
book