Teacher: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
Teacher: Now, understand the problem? Solve this instance: customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: Please book a flight ticket from SEA to ATL? 
 agent: Sure, may I know your planned travel dates? 
 customer: My journey dates are Aug 02 and Aug 04. 
 agent: May I know your connection limit? 
 customer: I need a connecting flight. 
 agent: Is there any class preference for you? 
 customer: I am Comfortable with any class. 
 agent: Your good name please. 
 customer: I am Janet Roberts. 
 agent: Sorry to say that, no flights were found with your given details. 
 customer: No problem, thank you for your information. 
 agent: Thank you for reaching us.
Student:
no_flight