Given the task definition and input, reply with output. 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. 
 customer: I am James Hernandez. 
 agent: How may I assist you today? 
 customer: I wish to go for golden gate bridge at San Francisco, SFO. Can you please book a ticket from Minneapolis, MSP? 
 agent: Sure, I am here to help you. May I know your travelling dates please? 
 customer: Trip dates are 04/27 to 04/29. 
 agent: Ok, please wait. 
 customer: Sure. 
 agent: Thanks for waiting, we found connecting flight 1003 in Southwest airline with fare of 100. Shall I proceed to book? 
 customer: You can proceed. 
 agent: Your ticket has been booked on your name. 
 customer: Thank you. 
 agent: Thank you for reaching us.
book