Detailed 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
Q: customer: Hi. 
 agent: Hello. How may I help you today? 
 customer: Can you please help me in reserving a flight ticket to LAX from DEN? 
 agent: Can you please mention your travelling dates? 
 customer: My travel dates are from Nov 25 to Nov 27. 
 agent: Sure, may I know your name? 
 customer: I am Jonathan Lewis. 
 agent: Any connecting flight required? 
 customer: Yes, I need a connecting flight. 
 agent: Is there any other specifications required for your flight ticket reservation? 
 customer: No. 
 agent: Please wait a moment. 
 customer: Ok. 
 agent: There is a flight with one connection and the price is 200 in JetBlue Airlines, can I proceed with the reservation? 
 customer: You can proceed with booking. 
 agent: Your ticket has been reserved with the flight number 1000. 
 customer: Thank you. 
 agent: Thank you for reaching our service.
A:
book