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

customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I am Kathleen Perez. I am planning to visit my cousin's home to attend a birthday party. Can you please help me out to book a ticket? 
 agent: Sure.may I know your airport codes please? 
 customer: Ok, my airport codes are BOS to SFO. 
 agent: Travelling dates please? 
 customer: Sure, my trip dates are 03/18 and 03/20. 
 agent: There is a flight with single connection flight, can I proceed for booking? 
 customer: Please proceed. 
 agent: Your booking is done in 1003 flight. Thank you. 
 customer: Thanks for your help.
book