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, I am Jerry Lopez. 
 agent: Hello, how can I help you today? 
 customer: Could you please reserve me a flight ticket to Houston, TX - IAH from Denver, CO - DEN? 
 agent: Sure, we are here to help you. 
 customer: Thank you. 
 agent: Kindly mention your travel dates. 
 customer: My travel dates are 07/06 - 07/08. 
 agent: How much can you afford for this journey? 
 customer: I can afford up to 500 only. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: There is a flight with your requirement, airline is AA with price 200 and single connection. Shall I proceed with booking? 
 customer: Please reserve. 
 agent: Your booking is done and flight number is 1026. 
 customer: Thank you. 
 agent: Thanks for reaching us.
Output:
book