Detailed Instructions: 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
Problem:customer: Hello. 
 agent: Hello. How can I help you at this moment? 
 customer: I am Dorothy Turner, can you help me to book a flight from EWR to CLT? 
 agent: Sure, can you please provide your travel dates to proceed further? 
 customer: Yes, I will be starting from my location on 06/29 and return date 07/01. 
 agent: Wait a moment please. 
 customer: Please book a flight within the limit 1000. I will wait. 
 agent: Hawaiian airlines is available on this route with a ticket fare of 200, shall I book your ticket? 
 customer: Ok, please book. 
 agent: Dorothy Turner, your ticket is booked with flight number 1019. 
 customer: Thank you for helping me with the flight booking and assistance. 
 agent: Thank you, have a safe journey.
Solution:
book