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. 
 customer: I am Scott Gonzalez. 
 agent: How can I serve you today? 
 customer: I would like to go Denver to attend our convocation so can you please book me a flight ticket within price 200? 
 agent: Sure Scott Gonzalez, I am here to help you, Can you please share your journey dates that you prefer to travel? 
 customer: Sure, I will prefer to travel on 10/20 and 10/22. 
 agent: Please let me know your travelling airport codes. 
 customer: Yes, my source and destination point is DFW and DEN. 
 agent: Thank you for providing your details, please wait for a while. 
 customer: Ok, take your time. 
 agent: We found a airline with fare of 100 which matches your travelling dates. Shall I proceed with booking in Spirit airline? 
 customer: Please go ahead with the booking. 
 agent: Your booking has been done with name of Scott Gonzalez in Spirit 1000 airline. 
 customer: Thank you for your help. 
 agent: Thank you for choosing us, have a great day.
A:
book