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, Daniel Lee is my name. 
 agent: Hello, how can I aid you today? 
 customer: As I am a singer, I want to participate in Music festival at Minneapolis & St. Paul, MN - MSP. Can you please book a ticket from Philadelphia, PA - PHL? 
 agent: Sure, we are happy to help you for booking. Can you please assign your journey dates? 
 customer: I will depart on 07/24 and return on 07/26. 
 agent: Ok, can I know your connection limit? 
 customer: I need a stopover. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Thanks for waiting, we found a flight in 1019 with a stopover and the cost is 100. 
 customer: Ok, please go ahead. 
 agent: Sure, your ticket has been booked in UA airline. 
 customer: Thanks for your help. 
 agent: Thank you for opting us.
Solution:
book