You will be given a definition of a task first, then some input of the task.
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

customer: Hi. I am Christine Perez. 
 agent: Hello. How may I be of your help? 
 customer: I want to book a flight ticket from OAK to CLT. Can you help me? 
 agent: Sure, please share your planned travelling dates to proceed further. 
 customer: Thank you. Aug 13th and 15th are my travelling dates. 
 agent: Could you please let me know your depart and return timings? 
 customer: I need to return in the afternoon. 
 agent: May I know if you prefer to have any other comforts in your journey? 
 customer: I need a connecting flight. 
 agent: Ok, please wait a moment. 
 customer: Ok. 
 agent: Thank you for sharing your journey details, we found a economy class ticket in Frontier airline with flight number-1024. Shall I book the ticket? 
 customer:  That's Perfect, You can reserve it. 
 agent:  Your ticket has been confirmed with the connecting flight and your return time in the afternoon. 
 customer: Thank you for your help. 
 agent: It's pleasure to serve you.
Output:
book