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, how can I assist you today? 
 customer: Myself Barbara Jackson from Minneapolis. Can you please help me in flight ticket booking process from MSP to LGA? 
 agent:  Sure, I can help you and can you please mention your departure and arrival dates of your journey? 
 customer: Thank you for your response, I want to take off on June 03 and please confirm my return ticket also on June 05. 
 agent: Do you prefer any halt in between your journey? 
 customer: Yes, I want 1 break in between my journey. 
 agent: Sure, is there any another specifications on your trip, so that I can book a ticket as per your wish? 
 customer: I want to departure in evening time so please check with this. 
 agent: Spirit airlines is providing a flight for you with fare 200 and connection limit is 1 with the departure time also 22.00PM. Can I proceed with this booking? 
 customer: Please confirm this flight ticket for me. 
 agent: Your flight ticket booking is done with the flight number 1019. 
 customer: Thank you for your help. 
 agent: Welcome, thank you for reaching us.
book