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,. I am Richard Adams. 
 agent: Hello, how can I render you today? 
 customer: I would like to attend for prayers in Old North Church at Boston, BOS. Can you help me in booking with a connecting flight? 
 agent:  Sure, I am here to assist you. 
 customer: Thank you. 
 agent: Can you please provide your take off airport code? 
 customer: I want to take off from Washington, DCA. 
 agent: On which dates would you like me to book a flight ticket for you? 
 customer: I would like to travel on 03/01 and intend to return on 03/03. 
 agent: Ok, please wait a moment, let me search a flight for you. 
 customer: Sure. 
 agent:  Thanks for your precious time. We found Delta airline fare of 100. Shall I proceed for booking with single stopover flight? 
 customer: Yes, proceed with the booking. 
 agent: Your ticket has been confirmed with airline number 1000. 
 customer: Thank you for your service. 
 agent: Thank you for reaching us.
A:
book