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 Emma Johnson. 
 agent: How can I help you today? 
 customer: I am looking for a flight from DTW to MSP, can you please help me out? 
 agent: Sure, I am here to help you in booking process. Can I have your travel dates please? 
 customer: My travelling dates are Oct 10 and Oct 12. 
 agent: Do you have any specification? 
 customer: I need a connecting flight. 
 agent: Please wait a moment. 
 customer: Ok, take your time. 
 agent: Here, I found a direct flight for you and it costs you 100. Can I proceed? 
 customer: Please proceed. 
 agent: Your booking is done with flight 1013 in Hawaiian airlines. 
 customer: Thank you for booking. 
 agent: Thank you for reaching us, have a safe flight.
book