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
Q: customer: Hello. 
 agent: Hello, how may I assist you today? 
 customer: Can you reserve me a ticket from OAK to MSP? 
 agent: Sure, may I know your planned travel dates? 
 customer: My trip dates are Feb 17 to 19. 
 agent: Do you have any limits on number of connections? 
 customer: I need a connecting flight. 
 agent: Do you have any another specifications on your journey? 
 customer: No. 
 agent: may I know your name for the booking process? 
 customer: Brian Perez here. 
 agent: Sorry, no flights are available on your requirement dates. 
 customer: Ok, no issues. Thank you for the information. 
 agent: Welcome, thank you for reaching us.
A:
no_flight