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 can I hand helping to you? 
 customer: I am Jeffrey Collins want to attend a workshop at Denver, can you book a ticket from OAK to DEN? 
 agent: Sure, can you please provide me the dates of your trip? 
 customer: Sure, my travelling dates will be 09/21 and 09/23. 
 agent: I found a 1 lay by in your journey in AA airlines, can I proceed with booking? 
 customer: Yes, proceed with my booking. 
 agent: Ok, the ticket booking is done in 1008 flight number. 
 customer: Thank you. 
 agent: Most welcome.
Output:
book