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: Hi. 
 agent: Hello, how may I aid you today? 
 customer: Can you find a flight for me from IAH to BOS? 
 agent: Sure, when are you planning to travel? 
 customer: Ok, my journey dates are from Feb 28 to Mar 01. 
 agent: On whose name should I reserve the flight ticket? 
 customer: Sure, I am Matthew Parker. 
 agent: Do you have any specifications to be met? 
 customer: I need a connecting flight. 
 agent: We found a flight in an airline Frontier with 1022 number having a single connection price of 100. Shall I proceed to book? 
 customer: Yes, you can. 
 agent: Your flight ticket has been confirmed. 
 customer: Thanks for your assistance. 
 agent: Thank you for reaching us.
Output:
book