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: I need to attend my parent's wedding anniversary on 05/26 in Washington DC - DCA, could you please help me to book my flight ticket. 
 agent: Sure, could you please provide your further details to proceed? 
 customer: OK. Actually I want to travel from Washington DC - DCA on 05/26 to Denver, CO - DEN. And my return date is on 05/28. Please make the booking with the name Anna Harris. 
 agent: OK, do you have any preference connections and price limit? 
 customer: Yes, price limit can be 1000 and connection must be one. 
 agent: OK, we are glad to inform you that we have found a flight on that day. details are as follows airline-Southwest flight number-1022 connection-1 and price is 100. Shall I proceed to booking? 
 customer: I am comfortable with this booking, you can proceed now. 
 agent: OK, your reservation has been done. 
 customer: Thank you. I am happy with your service. 
 agent: Your are welcome, thanks for contacting us. Have a great day ahead.
A:
book