Definition: 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: I am Patrick Williams. 
 agent: How may I guide you today? 
 customer: I want to book a ticket from MCO to IAH, can you please book a ticket? 
 agent: Sure, I will help you with that. Can you please share you preferable journey dates? 
 customer: My travelling dates are on Feb 05 and Feb 07. 
 agent: Do you have any class preference? 
 customer: No. 
 agent: Is there any connection limit? 
 customer: No. Sorry, I need single connection. 
 agent: Do you have any specifications? 
 customer: I want to return in the afternoon. 
 agent: I found a flight ticket for you with 0 connection is it ok for you? 
 customer: I am okay with it. You can proceed. 
 agent: The flight number is 1008 in economy class, I confirmed your ticket successfully. 
 customer: Thank you, may I know the airline name. 
 agent: The airline is Delta. 
 customer: Thank you. 
 agent: Thank you for reaching us.
Output:
book