Detailed Instructions: 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, I am Rebecca Hernandez. 
 agent: Hello, how may I assist you now? 
 customer: I want to book a flight ticket to watch a movie at the music box theater on 04/12 and return on 04/14, can you help me with booking please? 
 agent: Sure, I will help you with booking. Please share me your airport codes? 
 customer: Sure, I have planned to travel from Atlanta, GA-ATL and Houston, TX-IAH. 
 agent: Do you need any halt in between the journey? 
 customer: Yes, I need a connecting flight. 
 agent: Please mention your budget for flight ticket? 
 customer: I can pay up to 1000. 
 agent: Thanks for the details, please wait for a moment. 
 customer: Ok,. 
 agent: Thank you for waiting, I have a UA airline for you. Flight number is 1018 and fare is 100. Shall I proceed with booking? 
 customer: Yes, please proceed. 
 agent: Your flight ticket has been booed on flight 1018. 
 customer: Thank you. 
 agent: Thank you, have a nice journey.
A:
book