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
Input: customer: Hello. 
 agent: Hello. 
 customer: My name is Virginia Smith. 
 agent: How may I guide you? 
 customer: I want to book a flight from BOS to CLT. 
 agent: Ok, can I know your preferable dates? 
 customer: The dates are from 03/30 to 04/01. 
 agent: I found a flight 1011 of UA airlines matches with your preferences, can I proceed? 
 customer: Please proceed with the booking. 
 agent: Your ticket is booked. 
 customer: Thank you for your help. 
 agent: Thank you, have a good day.
Output:
book