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 assist you? 
 customer: Nancy Phillips here. Can you please help me in booking a ticket from LGA to BOS? 
 agent: Sure, I am here to help you. May I know your travel dates please? 
 customer: My preferable dates to do journey are 08/22 and 08/24. 
 agent: Ok, hold on for a moment. Let me check the best flight for you. 
 customer: Sure, carry on. 
 agent: I found a flight for you with UA airline and it costs you 300. Shall I proceed to cancel? 
 customer: That;s fine for me, please proceed for booking. 
 agent: Shall I proceed to book? Your ticket has been booked with 1005 flight number. 
 customer: Thank you so much. 
 agent: Welcome, thank you for choosing us. Have a safe flight.
A:
book