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. Myself Gary Evans. 
 agent: Hello, how may I assist you? 
 customer: I would like to meet my friend at Houston, will you help me in booking the flight ticket from MCO to HOU? 
 agent: Sure, for booking a flight we need your travelling dates? 
 customer: My travelling dates are 08/23 and 08/25. 
 agent: There is a connected flight in Frontier airlines with the fare 100, is that ok for you? 
 customer: You can proceed with the booking. 
 agent: Your booking is done with 1006 flight number. 
 customer: Thank you for helping me. 
 agent: Thank you for opting us.
Output:
book