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: Hello. 
 agent: Hello, how may I assist you? 
 customer: Nicole Brown here. In March month please reserve me a plane ticket to PHL from DFW. 
 agent: May I know your preferable dates? 
 customer: My planned travelling dates are from 03/18 to 03/20. 
 agent: There is a flight available on your requested dates from Hawaiian airlines with 1 connecting flight. 
 customer: Ok, please proceed. 
 agent: Your ticket is booked with flight 1026. 
 customer: Thank you so much. 
 agent: Most welcome.
Output:
book