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: Hello. 
 agent: Hello. How can I help you? 
 customer: I would like to book a ticket from MCO to DEN, can you please help me out? 
 agent: Can I know your travelling dates? 
 customer: I am travelling on these dates April 20th and 22nd. 
 agent: Is there any airline preference? 
 customer: I don't have any preference. 
 agent: Do you have any class preference? 
 customer: I don't have any other preferences. 
 agent: Let me know your name. 
 customer: Janet Phillips here. 
 agent: Connecting flight can be booked with Hawaiian airlines for price 100 having flight number 1000. 
 customer: Ok, you can proceed. 
 agent: Ticket is booked. 
 customer: Thank you for your services. 
 agent: Thank you.
A:
book