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: Hi. 
 agent: Hello. What can I do for you at this moment? 
 customer: I want to travel from ATL to PHL, can you please avail me a flight ticket? 
 agent: Sure, may I know your travelling dates? 
 customer: My travelling dates are from Aug 1st to Aug 3rd. 
 agent: Can I know your good name please? 
 customer: I am Donna Edwards. 
 agent: Do you have any other preferences? 
 customer: I want a break in between my journey. 
 agent: We found a Spirit Airlines with fare of 100 and a lay by in between the journey matches your schedule. 
 customer: Please proceed. 
 agent: Your ticket has been confirmed with flight number 1013. 
 customer: Thank you. 
 agent: Thank you for reaching us.
Output:
book