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
Problem:customer: Hi. 
 agent: Hello, how can I help you? 
 customer: I am Emily Roberts want to visit Museum of Science at Boston, can you book a ticket to BOS? 
 agent: Please share your desired travel dates? 
 customer: Sure, my travelling dates will be 06/23 and 06/25. 
 agent: May I know your source airport code please? 
 customer: Yes, I want to depart from IAD. 
 agent: Please wait a while. There is a flight with connection limit 1 and fare 100, is it ok for you? 
 customer: Ok, proceed with my booking. 
 agent: Ticket is reserved on the name Emily Roberts, flight number 1005. 
 customer: Thank you. 
 agent: Thank you for choosing us.
Solution:
book