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: Janet Adams here, can you find a flight for me from CLT to PHX? 
 agent: Please mention your travelling dates? 
 customer: Ok, my trip dates are from Dec 15 to 17. 
 agent: Do you need any connecting flight for this journey? 
 customer: Yes, I need a connecting flight. 
 agent: May I know your budget for this travel? 
 customer: I am ok with any price. 
 agent: Do you need any specifications? 
 customer: No. 
 agent: Please wait a moment. 
 customer: Sure, take your time. 
 agent: There is a flight in Southwest airlines with the price 100 in economy, can I proceed with the reservation? 
 customer: Yes, please. 
 agent: Your ticket has been reserved with the flight number 1003. 
 customer: Thanks for your assistance. 
 agent: Thank you for reaching our service.
A:
book