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. What kind of support are you looking for? 
 customer: I am a writer and I have to submit a crime report at Minneapolis printing press, so can you please help me with flight ticket booking from LGA to MSP locations? 
 agent: Sure, we will help that. 
 customer: Thank you. 
 agent: On which dates do you want to fly and return on? 
 customer: I would like to depart in the month of May on 22 and return back in the same month on 24. 
 agent: Do you prefer a flight with stopover? 
 customer: Yes, I usually prefer with a stopover. 
 agent: Do you need any other specifications? 
 customer: I don't have any other preferences. 
 agent: Can I know your good name? 
 customer: Sure, I am Scott Campbell. 
 agent: Thank you for providing your details, sorry to inform you that we are unable to find any flights by the given details. 
 customer: Ok, Thank you for your service. 
 agent: Thank you for consulting us, hope we serve you again.
no_flight