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, I am Elizabeth Rodriguez. 
 agent: Hello. What can I do for you now? 
 customer: Please help me in booking a flight ticket to Austin, AUS to attend a sports festival. 
 agent: Ok. To book a ticket, may I have your journey dates? 
 customer: My journey dates are from 07/05 to 07/07. 
 agent: Help me with your specifications. 
 customer: Price should not exceed 200. I need a halt in between my journey. 
 agent: What is your source code? 
 customer: I prefer to board on Seattle, SEA as it is my nearest airport. 
 agent: Thanks for your time. We are happy to inform you that there is a flight with 1 connection of price 200 in Frontier airline. Can I confirm your ticket? 
 customer: Yes, please. 
 agent: Reservation has been done. 
 customer: Thank you. 
 agent: Thank you for picking us.
Solution:
book