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 aid you today? 
 customer: I want to book a flight ticket from SEA to AUS, can you please help me with booking flight ticket? 
 agent: Sure, let me know your travel dates? 
 customer: Ok, my travelling dates are 06 and 08 of March. 
 agent: Do you have any preferences? 
 customer: I want to return in the morning. 
 agent: Ok, can you share your name to proceed further? 
 customer:         My name is  Steven Collins. 
 agent: Sorry, no flights found as per your requirements. 
 customer: That's fine, thank you for the information. 
 agent: Thank you for reaching us.
Student:
no_flight