You will be given a definition of a task first, then some input of the task.
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, I am Deborah Clark. 
 agent: Hello, how can I help you today? 
 customer: I would like to travel from LGA to attend my business meeting. Could you please help me to book a ticket to SEA? 
 agent: Sure, please share your planned trip dates? 
 customer: My travelling dates will be on 07/12 to 07/14. 
 agent: Ok, any other requirements to be met? 
 customer: I need a connecting flight. 
 agent: Ok, please wait for a while. 
 customer: Ok. 
 agent: Thanks for waiting, we found a direct flight, shall I proceed? 
 customer: No, do not proceed. Thank you for your information. 
 agent: Ok, no issues. Thank you for reaching us.
Output:
no_flight